title
Understanding SOHO Routers

description
Info Level: Beginner Presenter: Eli the Computer Guy Date Created: July 13, 2010 Length of Class: 52 Minutes Tracks Networking Prerequisites Introduction to Networking Purpose of Class This class discusses the uses and functionality of SOHO routers. Topics Covered Types of Routers External IP Addresses DHCP Server Port Forwarding Firewalls Port Triggering Examples of Multiple Router Configurations Class Notes SOHO Routers are better than residential routers, and easier to use then Enterprise routers Always buy a static IP address if servers on the LAN will provide services to the Internet DHCP is provided by most SOHO routers. Create a DHCP scope that does not include the static IP addresses used by other servers on the network. The DHCP server on a SOHO router can trigger other DHCP servers to turn off Port Forwarding allows you to forward specific types on Internet traffic to specific servers on the LAN Firewalls block ports which can prevent hacking, but can also cause problems for legitimate users

detail
{'title': 'Understanding SOHO Routers', 'heatmap': [{'end': 450.093, 'start': 412.456, 'weight': 0.783}, {'end': 1151.949, 'start': 1109.909, 'weight': 0.919}, {'end': 1818.259, 'start': 1778.165, 'weight': 0.763}, {'end': 2528.166, 'start': 2480.954, 'weight': 1}], 'summary': "Delves into soho routers, highlighting their functions for small office environments, cost-effectiveness, and suitability for offices with 10-50 users, emphasizing router configurations, the importance of external ip addresses, dhcp servers, dns, soho routers' functionalities, router redundancy and linksys rv016 series benefits, setting up dmz and port forwarding for security measures, and the significance of static ip addresses and network security features in soho routers.", 'chapters': [{'end': 426.85, 'segs': [{'end': 94.633, 'src': 'embed', 'start': 69.8, 'weight': 0, 'content': [{'end': 79.065, 'text': 'So what companies have done, like Cisco here and Linksys and Juniper and all that, is they came up with SOHO routers.', 'start': 69.8, 'duration': 9.265}, {'end': 86.849, 'text': 'Now what these SOHO routers do is they combine multiple logical devices into one physical device.', 'start': 79.465, 'duration': 7.384}, {'end': 94.633, 'text': 'So if you were dealing with a normal Cisco router, basically you would have one box like this and it would have two ports on it, and that is it.', 'start': 87.349, 'duration': 7.284}], 'summary': 'Cisco, linksys, and juniper have developed soho routers, combining multiple logical devices into one physical device.', 'duration': 24.833, 'max_score': 69.8, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig69800.jpg'}, {'end': 201.679, 'src': 'embed', 'start': 179.258, 'weight': 4, 'content': [{'end': 188.908, 'text': "and that's really all you need to know to understand how to administer SOHO routers that you're going to be using in the average home or office with up to 50 users.", 'start': 179.258, 'duration': 9.65}, {'end': 194.313, 'text': 'I mean, in an office with 50 users, can use this $200 Soho router right here.', 'start': 188.989, 'duration': 5.324}, {'end': 197.456, 'text': "They don't have to have a $5,000 Cisco router.", 'start': 194.473, 'duration': 2.983}, {'end': 201.679, 'text': "So give me a second and we'll dive into Soho routers.", 'start': 197.896, 'duration': 3.783}], 'summary': 'Administer soho routers for up to 50 users in home or office, avoiding costly alternatives.', 'duration': 22.421, 'max_score': 179.258, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig179258.jpg'}, {'end': 342.291, 'src': 'embed', 'start': 274.248, 'weight': 1, 'content': [{'end': 275.51, 'text': 'They need it working 99% of the time.', 'start': 274.248, 'duration': 1.262}, {'end': 278.712, 'text': "but they don't need it working 100% of the time.", 'start': 276.851, 'duration': 1.861}, {'end': 284.813, 'text': "So they're willing to cost cut a little bit and get just slightly less quality.", 'start': 278.752, 'duration': 6.061}, {'end': 287.414, 'text': "And that's where SOHO equipment comes in.", 'start': 284.953, 'duration': 2.461}, {'end': 295.296, 'text': "So again, if you're dealing with offices of 10 to 20 people, you may look at SOHO networking equipment as something that will be useful.", 'start': 287.474, 'duration': 7.822}, {'end': 305.039, 'text': "Because again, it's more, it's better quality than residential, less quality than enterprise, but it's also, not going to cost you an arm and a leg.", 'start': 295.456, 'duration': 9.583}, {'end': 316.383, 'text': 'A Soho 48 port switch will cost you $800-$900 versus an Enterprise 48 port switch is going to cost you $1,500-$2,000.', 'start': 305.419, 'duration': 10.964}, {'end': 331.748, 'text': 'The other thing that makes Soho equipment better for most consultants or most small IT shops versus Enterprise equipment is the fact that almost all the Soho equipment is web GUI administerable.', 'start': 316.863, 'duration': 14.885}, {'end': 335.269, 'text': 'So, basically, you open up a web browser,', 'start': 332.088, 'duration': 3.181}, {'end': 342.291, 'text': 'you go to the IP address of the networking equipment and you can configure the networking equipment through a little web interface.', 'start': 335.269, 'duration': 7.022}], 'summary': 'Soho equipment offers better quality than residential but less than enterprise, costing $800-$900 for a 48-port switch compared to $1,500-$2,000 for an enterprise switch.', 'duration': 68.043, 'max_score': 274.248, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig274248.jpg'}], 'start': 5.728, 'title': 'Soho routers', 'summary': 'Explains the concept of soho routers, which combine multiple logical devices into one physical device, providing functions such as routing, switching, firewall, and vpn, making them suitable for small office environments with fewer devices. it also highlights that soho routers are cost-effective, web gui administerable, and suitable for offices with 10-50 users.', 'chapters': [{'end': 179.258, 'start': 5.728, 'title': 'Understanding soho routers', 'summary': 'Explains the concept of soho routers, which combine multiple logical devices into one physical device, providing functions such as routing, switching, firewall, and vpn, making them suitable for small office environments with fewer devices.', 'duration': 173.53, 'highlights': ['SOHO routers combine multiple logical devices into one physical device, providing functions such as routing, switching, firewall, and VPN, making them suitable for small office environments with fewer devices.', 'Normal routers only route traffic between different subnets, while SOHO routers have additional functionalities such as a switch, firewall, DHCP server, and DNS server.', 'Enterprises routers handle a lot of routing between different subnets, while SOHO routers are designed for smaller offices with only a few computers.']}, {'end': 426.85, 'start': 179.258, 'title': 'Understanding soho routers', 'summary': 'Explains the differences between soho and enterprise class routers, highlighting that soho routers are cost-effective, web gui administerable, and suitable for offices with 10-50 users.', 'duration': 247.592, 'highlights': ['SOHO equipment is suitable for offices with 10 to 20 people, offering better quality than residential gear and costing less than enterprise equipment.', 'A Soho 48 port switch costs $800-$900, while an Enterprise 48 port switch costs $1,500-$2,000, providing a significant cost difference.', 'SOHO equipment allows for web GUI administration, making it user-friendly and accessible, unlike enterprise equipment that requires command line interface (CLI) and has a steeper learning curve.', 'The learning curve for using Cisco routers in a small business setting can be steep, while SOHO Linksys gear is easier to train employees on, making it a more practical choice for small IT shops.', 'SOHO routers are viable for offices with up to 50 users, eliminating the need for expensive enterprise-class routers, such as a $5,000 Cisco router.']}], 'duration': 421.122, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig5728.jpg', 'highlights': ['SOHO routers combine multiple logical devices into one physical device, providing functions such as routing, switching, firewall, and VPN, making them suitable for small office environments with fewer devices.', 'SOHO equipment is suitable for offices with 10 to 20 people, offering better quality than residential gear and costing less than enterprise equipment.', 'SOHO equipment allows for web GUI administration, making it user-friendly and accessible, unlike enterprise equipment that requires command line interface (CLI) and has a steeper learning curve.', 'A Soho 48 port switch costs $800-$900, while an Enterprise 48 port switch costs $1,500-$2,000, providing a significant cost difference.', 'SOHO routers are viable for offices with up to 50 users, eliminating the need for expensive enterprise-class routers, such as a $5,000 Cisco router.']}, {'end': 985.009, 'segs': [{'end': 476.474, 'src': 'embed', 'start': 432.728, 'weight': 0, 'content': [{'end': 440.31, 'text': "Now, since this is basically an introductory router class, we're not going to go into insane configurations with routers.", 'start': 432.728, 'duration': 7.582}, {'end': 441.071, 'text': 'At the end of this,', 'start': 440.59, 'duration': 0.481}, {'end': 450.093, 'text': "we're going to go over two examples and I'll draw out for you how you may expect to use multiple routers in a small office or small business configuration.", 'start': 441.071, 'duration': 9.022}, {'end': 455.175, 'text': "But basically, we're going to assume you have a very, very simple configuration.", 'start': 450.554, 'duration': 4.621}, {'end': 457.016, 'text': 'Like I say, routers can be insane.', 'start': 455.215, 'duration': 1.801}, {'end': 461.459, 'text': 'You can have just thousands of routers all doing wacky stuff.', 'start': 457.056, 'duration': 4.403}, {'end': 466.304, 'text': "But for the small office, for you, we're not going to worry about that.", 'start': 461.559, 'duration': 4.745}, {'end': 476.474, 'text': "So the first thing that we're going to talk about is your external IP address or how people are going to get to your internal network from the outside world.", 'start': 466.624, 'duration': 9.85}], 'summary': 'Introductory router class with focus on simple configurations and small office setups.', 'duration': 43.746, 'max_score': 432.728, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig432728.jpg'}, {'end': 521.589, 'src': 'embed', 'start': 497.623, 'weight': 1, 'content': [{'end': 506.68, 'text': 'So you may have a web server here, You know, like every man IT, we host one of our web servers straight in this building here.', 'start': 497.623, 'duration': 9.057}, {'end': 509.401, 'text': 'You may have something called a small business server,', 'start': 507.44, 'duration': 1.961}, {'end': 516.746, 'text': 'a Microsoft small business server that allows people to get VPN access or virtual private network access into the network.', 'start': 509.401, 'duration': 7.345}, {'end': 519.908, 'text': 'You may have a telephone server or an email server.', 'start': 517.265, 'duration': 2.643}, {'end': 521.589, 'text': "That's probably a big one.", 'start': 520.629, 'duration': 0.96}], 'summary': 'This building hosts a web server, a small business server for vpn access, and a telephone or email server.', 'duration': 23.966, 'max_score': 497.623, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig497623.jpg'}, {'end': 814.957, 'src': 'embed', 'start': 785.369, 'weight': 3, 'content': [{'end': 789.791, 'text': 'because it means you literally have to sit down at every single computer and type in that IP address.', 'start': 785.369, 'duration': 4.422}, {'end': 798.353, 'text': 'With DHCP, basically, the router can automatically assign IP addresses to the computers.', 'start': 790.771, 'duration': 7.582}, {'end': 806.075, 'text': 'So when this computer connects to the network, it will ask for an IP address and the router will give it the IP address.', 'start': 798.853, 'duration': 7.222}, {'end': 806.735, 'text': "So it'll say your 192.168.1.40.", 'start': 806.115, 'duration': 0.62}, {'end': 814.957, 'text': "And then when this computer asks for an IP address, it'll give it an IP address, etc.", 'start': 806.735, 'duration': 8.222}], 'summary': 'Dhcp allows routers to automatically assign ip addresses to computers, improving efficiency and convenience.', 'duration': 29.588, 'max_score': 785.369, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig785369.jpg'}, {'end': 921.538, 'src': 'embed', 'start': 890.379, 'weight': 2, 'content': [{'end': 895.783, 'text': 'some devices on your network and servers should always have a static IP address.', 'start': 890.379, 'duration': 5.404}, {'end': 897.544, 'text': 'So your servers.', 'start': 896.083, 'duration': 1.461}, {'end': 903.427, 'text': 'like I say, if you have an email server, if you have a web server, if you have a VPN virtual private network server,', 'start': 897.544, 'duration': 5.883}, {'end': 907.09, 'text': 'these servers should always have a static IP address.', 'start': 903.427, 'duration': 3.663}, {'end': 910.011, 'text': "Again, I'm going to tell you why in a minute when we go into port forwarding.", 'start': 907.17, 'duration': 2.841}, {'end': 921.538, 'text': "Now here's the thing you don't want this router accidentally giving another computer on the network the same IP address as one that your server or your networking equipment has.", 'start': 910.592, 'duration': 10.946}], 'summary': 'Key servers like email, web, and vpn should have static ips to avoid conflicts.', 'duration': 31.159, 'max_score': 890.379, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig890379.jpg'}], 'start': 432.728, 'title': 'Router configurations and ip address importance', 'summary': 'Introduces basic router configurations for small office setups and emphasizes the importance of external ip addresses for hosting web, vpn, and email servers. it also highlights the significance of static ip addresses for small business servers and the benefits of using dhcp for ip address allocation.', 'chapters': [{'end': 521.589, 'start': 432.728, 'title': 'Introduction to routers and small business configurations', 'summary': 'Introduces basic router configurations for small office or small business setups, emphasizing the importance of external ip addresses and the hosting of servers like web, vpn, and email servers.', 'duration': 88.861, 'highlights': ['Routers can have complex configurations, but for small office setups, simplicity is assumed.', 'Understanding the importance of external IP address for accessing internal network from the outside world.', 'Hosting servers like web, VPN, and email servers in small business configurations.']}, {'end': 985.009, 'start': 522.169, 'title': 'Importance of static ip address', 'summary': 'Emphasizes the importance of having a static ip address for small business servers or exchange servers, highlighting the potential issues with dynamic ip addresses and the benefits of using dhcp for ip address allocation.', 'duration': 462.84, 'highlights': ['The chapter emphasizes the importance of having a static IP address for small business servers or exchange servers, highlighting the potential issues with dynamic IP addresses. potential issues with dynamic IP addresses', 'The benefits of using DHCP for IP address allocation is explained, highlighting the automatic assignment of IP addresses to computers and the ability to specify the range of addresses to be allocated within the network. automatic assignment of IP addresses to computers', 'The significance of ensuring that DHCP does not hand out IP addresses for computers that have static IP addresses is highlighted, emphasizing the potential problems that may arise if the same IP address is assigned to different devices within the network. potential problems if the same IP address is assigned to different devices within the network']}], 'duration': 552.281, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig432728.jpg', 'highlights': ['Understanding the importance of external IP address for accessing internal network from the outside world.', 'Hosting servers like web, VPN, and email servers in small business configurations.', 'The chapter emphasizes the importance of having a static IP address for small business servers or exchange servers, highlighting the potential issues with dynamic IP addresses.', 'The benefits of using DHCP for IP address allocation is explained, highlighting the automatic assignment of IP addresses to computers and the ability to specify the range of addresses to be allocated within the network.', 'The significance of ensuring that DHCP does not hand out IP addresses for computers that have static IP addresses is highlighted, emphasizing the potential problems that may arise if the same IP address is assigned to different devices within the network.', 'Routers can have complex configurations, but for small office setups, simplicity is assumed.']}, {'end': 1861.253, 'segs': [{'end': 1012.5, 'src': 'embed', 'start': 985.73, 'weight': 0, 'content': [{'end': 994.397, 'text': 'The other thing to remember with DHCP servers, just as a heads up, because I know a lot of you guys are newbies.', 'start': 985.73, 'duration': 8.667}, {'end': 1001.556, 'text': 'A lot of times, when you have a small network, you will let the router be the DHCP server.', 'start': 996.914, 'duration': 4.642}, {'end': 1008.999, 'text': 'Well, once you start getting real servers on the network, you normally want those servers to handle being the DHCP server.', 'start': 1002.056, 'duration': 6.943}, {'end': 1012.5, 'text': 'So you want the server to hand out the DHCP addresses,', 'start': 1009.019, 'duration': 3.481}], 'summary': 'When transitioning to real servers, let them handle dhcp to manage addresses.', 'duration': 26.77, 'max_score': 985.73, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig985730.jpg'}, {'end': 1077.125, 'src': 'embed', 'start': 1054.908, 'weight': 2, 'content': [{'end': 1064.538, 'text': 'But basically, if you accidentally put two servers on the network trying to hand out DHCP addresses, you can cause a lot of problems.', 'start': 1054.908, 'duration': 9.63}, {'end': 1065.799, 'text': 'So just keep that in mind.', 'start': 1064.638, 'duration': 1.161}, {'end': 1070.962, 'text': "If you're dealing with Windows servers or if you have another DHCP server on the network,", 'start': 1065.839, 'duration': 5.123}, {'end': 1077.125, 'text': 'make sure you turn off the DHCP server on this router before you plug it into the rest of the network.', 'start': 1070.962, 'duration': 6.163}], 'summary': 'Avoid network issues by turning off dhcp server on router when using windows servers or another dhcp server.', 'duration': 22.217, 'max_score': 1054.908, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1054908.jpg'}, {'end': 1151.949, 'src': 'heatmap', 'start': 1109.909, 'weight': 0.919, 'content': [{'end': 1117.432, 'text': 'But DHCP, all this is, the server on here, is it automatically assigns IP addresses to the client computers on the network.', 'start': 1109.909, 'duration': 7.523}, {'end': 1120.773, 'text': "And again, you have what's called the DHCP scope.", 'start': 1117.872, 'duration': 2.901}, {'end': 1125.255, 'text': 'And this is where you tell it what range you want to give the IP addresses.', 'start': 1121.093, 'duration': 4.162}, {'end': 1134.699, 'text': 'So like I said, 192.1681 to 100 to 200.', 'start': 1125.295, 'duration': 9.404}, {'end': 1144.545, 'text': 'Now along with the DHCP server services that your router will have, your router will almost always also have DNS services, so DNS.', 'start': 1134.699, 'duration': 9.846}, {'end': 1151.949, 'text': 'Now all DNS is is a domain name service or domain name server.', 'start': 1145.505, 'duration': 6.444}], 'summary': 'Dhcp server assigns ip addresses; dhcp scope defines range; dns is domain name service.', 'duration': 42.04, 'max_score': 1109.909, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1109909.jpg'}, {'end': 1211.208, 'src': 'embed', 'start': 1186.047, 'weight': 1, 'content': [{'end': 1195.715, 'text': "Now, as you should know, or as you'll learn doing networking, remember computers on the TCP IP network.", 'start': 1186.047, 'duration': 9.668}, {'end': 1199.758, 'text': 'all they really care about are TCP IP network addresses.', 'start': 1195.715, 'duration': 4.043}, {'end': 1205.203, 'text': 'Things like names like PC1 or PC2 or server or such.', 'start': 1200.679, 'duration': 4.524}, {'end': 1209.386, 'text': "These names that we call computers, the computers really don't care about.", 'start': 1205.723, 'duration': 3.663}, {'end': 1211.208, 'text': 'They care about the IP address.', 'start': 1209.546, 'duration': 1.662}], 'summary': 'Computers on a tcp ip network care about ip addresses, not names.', 'duration': 25.161, 'max_score': 1186.047, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1186047.jpg'}, {'end': 1292.913, 'src': 'embed', 'start': 1256.206, 'weight': 3, 'content': [{'end': 1260.029, 'text': 'Basically, the DNS server is either on or the DNS server is off.', 'start': 1256.206, 'duration': 3.823}, {'end': 1261.31, 'text': "That's all there is.", 'start': 1260.689, 'duration': 0.621}, {'end': 1269.617, 'text': "But it's good to know that on top of the DHCP service where they hand out IP addresses, these routers also act as name servers.", 'start': 1261.43, 'duration': 8.187}, {'end': 1281.383, 'text': 'So probably one of the most important things to understand about the SOHO routers is port forwarding.', 'start': 1275.598, 'duration': 5.785}, {'end': 1292.913, 'text': 'So what port forwarding does is it tells the router to forward specific types of traffic to a specific computer on the internal network.', 'start': 1281.663, 'duration': 11.25}], 'summary': 'Soho routers provide dns and dhcp services, and enable port forwarding.', 'duration': 36.707, 'max_score': 1256.206, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1256206.jpg'}, {'end': 1511.315, 'src': 'embed', 'start': 1483.514, 'weight': 4, 'content': [{'end': 1488.079, 'text': 'If you have a voice over IP phone system, it would get forwarded over to another IP address.', 'start': 1483.514, 'duration': 4.565}, {'end': 1496.144, 'text': 'The main thing with port forwarding though is all these servers that you have on your internal network need a static IP address.', 'start': 1488.559, 'duration': 7.585}, {'end': 1499.367, 'text': 'So they cannot get their IP addresses from DHCP.', 'start': 1496.605, 'duration': 2.762}, {'end': 1502.729, 'text': 'You have to hard code these IP addresses into the server.', 'start': 1499.387, 'duration': 3.342}, {'end': 1506.731, 'text': 'So this web server will always be 192.168.1.10.', 'start': 1503.169, 'duration': 3.562}, {'end': 1511.315, 'text': 'This email server will always be 192.168.1.11.', 'start': 1506.732, 'duration': 4.583}], 'summary': 'To enable port forwarding, servers need static ip addresses, e.g., web server: 192.168.1.10, email server: 192.168.1.11.', 'duration': 27.801, 'max_score': 1483.514, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1483514.jpg'}, {'end': 1765.047, 'src': 'embed', 'start': 1739.81, 'weight': 5, 'content': [{'end': 1746.341, 'text': 'and so people are still not going to be able to get to your web server because the firewall is blocking all port 80 traffic.', 'start': 1739.81, 'duration': 6.531}, {'end': 1748.702, 'text': 'See how that works? So be careful with this.', 'start': 1746.661, 'duration': 2.041}, {'end': 1755.144, 'text': 'Some SOHO routers, if you do port forwarding, it will automatically open the appropriate ports in the firewall.', 'start': 1748.922, 'duration': 6.222}, {'end': 1759.145, 'text': 'Most of them though, like I say, firewall rules take precedence.', 'start': 1755.744, 'duration': 3.401}, {'end': 1765.047, 'text': "If you say block everything in the firewall rule, then that's going to block everything.", 'start': 1759.225, 'duration': 5.822}], 'summary': 'Firewalls can block port 80 traffic, but soho routers may open ports for port forwarding.', 'duration': 25.237, 'max_score': 1739.81, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1739810.jpg'}, {'end': 1818.259, 'src': 'heatmap', 'start': 1778.165, 'weight': 0.763, 'content': [{'end': 1786.209, 'text': "I'm going to make the network so much more secure, so I'm going to block everything other than port 80, port 25, and port 21..", 'start': 1778.165, 'duration': 8.044}, {'end': 1789.011, 'text': 'Again, Skype uses a different port.', 'start': 1786.209, 'duration': 2.802}, {'end': 1792.252, 'text': 'All these other services, Instant Messenger uses a different port.', 'start': 1789.191, 'duration': 3.061}, {'end': 1798.695, 'text': "So they block all these ports, and then all of a sudden Instant Messenger isn't working, Skype isn't working, all these things aren't working.", 'start': 1792.552, 'duration': 6.143}, {'end': 1803.376, 'text': 'So you have to be very, very careful with setting the firewall.', 'start': 1799.615, 'duration': 3.761}, {'end': 1810.237, 'text': 'All it does is block the ports, but if you block the wrong ports, you can cause more problems than frankly the hackers are going to cause.', 'start': 1803.656, 'duration': 6.581}, {'end': 1818.259, 'text': 'Now the next thing to talk about is something called port triggering.', 'start': 1816.238, 'duration': 2.021}], 'summary': 'Enhancing network security by selectively blocking ports, caution with firewall setup, and considering port triggering.', 'duration': 40.094, 'max_score': 1778.165, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1778165.jpg'}], 'start': 985.73, 'title': 'Dhcp servers, dns, soho routers', 'summary': "Discusses configuring servers as dhcp servers, the impact of multiple dhcp servers, and the role of dns in translating computer names to ip addresses. it also explains soho routers' functionalities, including port forwarding and firewall configuration, emphasizing the importance of understanding port usage and being cautious with firewall settings.", 'chapters': [{'end': 1236.753, 'start': 985.73, 'title': 'Dhcp servers and dns overview', 'summary': 'Discusses the importance of configuring servers as dhcp servers, the impact of having multiple dhcp servers, and the role of dns in translating computer names to ip addresses on a tcp/ip network.', 'duration': 251.023, 'highlights': ['Configuring servers as DHCP servers is crucial for larger networks like small business servers It is important to configure servers as DHCP servers for larger networks like small business servers.', 'Impact of having multiple DHCP servers can cause network issues and server disruptions Having multiple DHCP servers can cause network issues and server disruptions, leading to significant problems.', 'DNS translates computer names into IP addresses on a TCP/IP network DNS plays a crucial role in translating computer names into IP addresses on a TCP/IP network, enabling efficient communication between computers.']}, {'end': 1861.253, 'start': 1237.493, 'title': 'Soho routers: port forwarding and firewall', 'summary': "Explains soho routers' functionalities, including port forwarding and firewall configuration, to route specific types of traffic to internal servers and block ports to prevent unauthorized access, emphasizing the importance of understanding port usage and being cautious with firewall settings.", 'duration': 623.76, 'highlights': ['SOHO routers act as name servers and can forward specific types of traffic to internal servers (port forwarding) based on port numbers, such as web server on port 80 and email server on port 25. SOHO routers serve as name servers and facilitate port forwarding to direct specific traffic types, like web server (port 80) and email server (port 25), to internal servers.', 'Understanding the need for static IP addresses and port usage is crucial; all internal servers require a static IP address for port forwarding. Internal servers necessitate static IP addresses for port forwarding, requiring a comprehensive understanding of port usage and server configurations.', "Firewalls in SOHO routers block specific ports to prevent unauthorized access, but it's crucial to be cautious as blocking certain ports may affect outgoing traffic, highlighting the importance of understanding and configuring firewall settings. Firewalls on SOHO routers block specific ports to prevent unauthorized access, necessitating careful configuration to avoid disrupting outgoing traffic, emphasizing the significance of understanding and configuring firewall settings."]}], 'duration': 875.523, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig985730.jpg', 'highlights': ['Configuring servers as DHCP servers is crucial for larger networks like small business servers.', 'DNS plays a crucial role in translating computer names into IP addresses on a TCP/IP network, enabling efficient communication between computers.', 'Impact of having multiple DHCP servers can cause network issues and server disruptions, leading to significant problems.', 'SOHO routers serve as name servers and facilitate port forwarding to direct specific traffic types, like web server (port 80) and email server (port 25), to internal servers.', 'Internal servers necessitate static IP addresses for port forwarding, requiring a comprehensive understanding of port usage and server configurations.', 'Firewalls on SOHO routers block specific ports to prevent unauthorized access, necessitating careful configuration to avoid disrupting outgoing traffic, emphasizing the significance of understanding and configuring firewall settings.']}, {'end': 2193.388, 'segs': [{'end': 1972.916, 'src': 'embed', 'start': 1888, 'weight': 0, 'content': [{'end': 1898.764, 'text': 'So with this particular model right here, you could plug in up to four different internet connections, so that if any single one failed,', 'start': 1888, 'duration': 10.764}, {'end': 1900.144, 'text': 'the office would still be on the internet.', 'start': 1898.764, 'duration': 1.38}, {'end': 1907.446, 'text': "So you could plug Comcast into one, you could plug DSL into another, and you could plug, I don't know, Clear, that whole Wi-Fi thing into another.", 'start': 1900.424, 'duration': 7.022}, {'end': 1913.607, 'text': 'And so if any one of those internet connections failed, then you were still on the internet.', 'start': 1907.766, 'duration': 5.841}, {'end': 1919.809, 'text': 'You know, this is something you just have to look at the different features of what, you know, different routers have.', 'start': 1914.568, 'duration': 5.241}, {'end': 1924.572, 'text': "But like I say, this particular series, it's the RV016.", 'start': 1920.189, 'duration': 4.383}, {'end': 1930.476, 'text': 'They have four port versions, eight port switch versions, and this 16 port guy.', 'start': 1925.913, 'duration': 4.563}, {'end': 1934.258, 'text': 'Like I say, the nice part is, and something to think about, is that it offers redundancy.', 'start': 1930.856, 'duration': 3.402}, {'end': 1941.563, 'text': 'Now that internet has become so inexpensive, I mean, Comcast business class internet in my area is $60.', 'start': 1934.739, 'duration': 6.824}, {'end': 1944.926, 'text': 'Verizon business class internet is $30.', 'start': 1941.563, 'duration': 3.363}, {'end': 1949.269, 'text': 'So, basically, for $100 a month, you can have a redundant internet connection.', 'start': 1944.926, 'duration': 4.343}, {'end': 1952.51, 'text': 'You know, like I say, once you start dealing with real businesses,', 'start': 1950.089, 'duration': 2.421}, {'end': 1961.993, 'text': 'businesses with 10 or 20 people $100 a month is a pittance compared to what happens if Comcast goes down for a day or what happens if Verizon goes down for a day.', 'start': 1952.51, 'duration': 9.483}, {'end': 1965.254, 'text': 'So something to think about with your clients.', 'start': 1962.393, 'duration': 2.861}, {'end': 1972.916, 'text': "you know I say I'd highly suggest it is at least with these Linksys series and a few of the other Soho series you can have redundant internet connections.", 'start': 1965.254, 'duration': 7.662}], 'summary': 'The rv016 model offers up to four internet connections for redundancy, with comcast at $60 and verizon at $30 for business class internet, enabling a redundant connection for $100 a month.', 'duration': 84.916, 'max_score': 1888, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1888000.jpg'}, {'end': 2042.081, 'src': 'embed', 'start': 2020.368, 'weight': 5, 'content': [{'end': 2029.813, 'text': "we went over this in the physical network segmentation class, but We'll talk about a little more here, so you get a better idea of what's going on.", 'start': 2020.368, 'duration': 9.445}, {'end': 2037.478, 'text': "So with a DMZ, the idea is you're using one single internet connection, but you want two levels of security.", 'start': 2030.273, 'duration': 7.205}, {'end': 2042.081, 'text': "So you want part of your network that doesn't have very much security on it at all,", 'start': 2037.798, 'duration': 4.283}], 'summary': 'Explaining the concept of a dmz for dual-level security in a network.', 'duration': 21.713, 'max_score': 2020.368, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2020368.jpg'}, {'end': 2201.676, 'src': 'embed', 'start': 2174.313, 'weight': 7, 'content': [{'end': 2178.435, 'text': "You know, if the web server gets hacked, that's a pain in the butt, but you can deal with it.", 'start': 2174.313, 'duration': 4.122}, {'end': 2181.457, 'text': "If your Active Directory server gets hacked, you're screwed.", 'start': 2178.775, 'duration': 2.682}, {'end': 2184.52, 'text': 'So you want your Active Directory server to be secure.', 'start': 2182.177, 'duration': 2.343}, {'end': 2188.423, 'text': 'And then beyond that, you have all your other client computers down here.', 'start': 2184.92, 'duration': 3.503}, {'end': 2193.388, 'text': "So basically, in order to make this work, it's pretty simple.", 'start': 2189.264, 'duration': 4.124}, {'end': 2197.051, 'text': "So you have this one router here, and you're not going to turn on the firewall rules.", 'start': 2193.828, 'duration': 3.223}, {'end': 2201.676, 'text': 'What you are going to use, though, is what we talked about before, is port forwarding.', 'start': 2197.692, 'duration': 3.984}], 'summary': 'Securing the active directory server is crucial for network protection.', 'duration': 27.363, 'max_score': 2174.313, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2174313.jpg'}], 'start': 1867.102, 'title': 'Router redundancy and linksys rv016', 'summary': 'Discusses the linksys rv016 router series, which provides internet redundancy with up to four different internet connections, ensuring uninterrupted office internet access. it also highlights the benefits of redundant internet connections, emphasizing business continuity and added security through the use of multiple routers.', 'chapters': [{'end': 1930.476, 'start': 1867.102, 'title': 'Router redundancy and linksys rv016', 'summary': 'Discusses the linksys rv016 router series, which offers internet redundancy by allowing up to four different internet connections to be plugged in, ensuring uninterrupted internet access for the office.', 'duration': 63.374, 'highlights': ['The Linksys RV016 router series offers internet redundancy by allowing up to four different internet connections to be plugged in, ensuring uninterrupted internet access for the office.', 'The specific model discussed, the RV016, can accommodate up to four different internet connections, such as Comcast, DSL, and Wi-Fi, providing a reliable failover system for internet access.', 'This particular router series, the RV016, is available in four-port, eight-port switch, and 16-port versions, offering flexibility in network setup and expansion.']}, {'end': 2193.388, 'start': 1930.856, 'title': 'Redundant internet connections', 'summary': 'Discusses the benefits of redundant internet connections, highlighting the cost and importance of ensuring business continuity with examples of using multiple routers to create a dmz for added security.', 'duration': 262.532, 'highlights': ['It offers redundant internet connections with Comcast business class internet priced at $60 and Verizon business class internet at $30, allowing for a redundant internet connection for $100 a month.', 'For businesses dealing with 10 to 20 people, $100 a month for redundant internet connections is vital compared to the potential loss if the primary internet connection fails.', 'The chapter outlines the concept of using multiple routers to create a DMZ, providing an additional layer of security for web services and wireless access while keeping critical servers secure.', 'The DMZ setup involves using one internet connection with two levels of security, with the first router serving less secure devices like web servers and wireless access points, and the second router providing security for critical servers like Active Directory and email servers.', 'The chapter emphasizes the importance of securing critical servers like Active Directory servers and email servers, as a hack on these servers could have severe consequences for the organization.']}], 'duration': 326.286, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig1867102.jpg', 'highlights': ['The Linksys RV016 router series offers internet redundancy by allowing up to four different internet connections to be plugged in, ensuring uninterrupted internet access for the office.', 'The specific model discussed, the RV016, can accommodate up to four different internet connections, such as Comcast, DSL, and Wi-Fi, providing a reliable failover system for internet access.', 'This particular router series, the RV016, is available in four-port, eight-port switch, and 16-port versions, offering flexibility in network setup and expansion.', 'It offers redundant internet connections with Comcast business class internet priced at $60 and Verizon business class internet at $30, allowing for a redundant internet connection for $100 a month.', 'For businesses dealing with 10 to 20 people, $100 a month for redundant internet connections is vital compared to the potential loss if the primary internet connection fails.', 'The chapter outlines the concept of using multiple routers to create a DMZ, providing an additional layer of security for web services and wireless access while keeping critical servers secure.', 'The DMZ setup involves using one internet connection with two levels of security, with the first router serving less secure devices like web servers and wireless access points, and the second router providing security for critical servers like Active Directory and email servers.', 'The chapter emphasizes the importance of securing critical servers like Active Directory servers and email servers, as a hack on these servers could have severe consequences for the organization.']}, {'end': 2848.142, 'segs': [{'end': 2243.356, 'src': 'embed', 'start': 2215.462, 'weight': 3, 'content': [{'end': 2221.804, 'text': 'So any port, anything coming in from the internet using port 80 is going to go to this web server.', 'start': 2215.462, 'duration': 6.342}, {'end': 2229.188, 'text': "So you're going to put in the static IP address of this web server, 192.168.2.2, let's say.", 'start': 2222.344, 'duration': 6.844}, {'end': 2234.43, 'text': 'So this web server is 192.168.2.2.', 'start': 2229.988, 'duration': 4.442}, {'end': 2235.411, 'text': 'So everything goes there.', 'start': 2234.431, 'duration': 0.98}, {'end': 2243.356, 'text': "Then what you're going to say is, like I say, for the secure network, you have email servers, you have VPN, etc.", 'start': 2236.152, 'duration': 7.204}], 'summary': 'Incoming traffic on port 80 directed to web server at 192.168.2.2; secure network includes email servers and vpn.', 'duration': 27.894, 'max_score': 2215.462, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2215462.jpg'}, {'end': 2341.396, 'src': 'embed', 'start': 2283.608, 'weight': 4, 'content': [{'end': 2288.792, 'text': 'The internal IP address of this router does have to be a different subnet.', 'start': 2283.608, 'duration': 5.184}, {'end': 2292.494, 'text': 'Remember, routers route between two different subnets.', 'start': 2288.832, 'duration': 3.662}, {'end': 2298.539, 'text': "So if you use 192.168.2.3 on this side, you're going to have problems.", 'start': 2292.675, 'duration': 5.864}, {'end': 2300.04, 'text': "It's not going to work properly.", 'start': 2298.839, 'duration': 1.201}, {'end': 2305.883, 'text': 'So you need the inside IP address of the router to be a different subnet.', 'start': 2300.68, 'duration': 5.203}, {'end': 2307.765, 'text': 'So for router 2, we would do 192.168.1.1.', 'start': 2306.284, 'duration': 1.481}, {'end': 2313.288, 'text': 'So the external IP address of router 2 is 192.168.2.3.', 'start': 2307.765, 'duration': 5.523}, {'end': 2315.249, 'text': 'The internal IP address is a different subnet, 192.168.1.1.', 'start': 2313.288, 'duration': 1.961}, {'end': 2333.188, 'text': "Now in router 2, you're going to configure and you're going to say port 25 goes to the email server.", 'start': 2315.249, 'duration': 17.939}, {'end': 2337.932, 'text': "And then you'll say port 47 goes to the VPN server.", 'start': 2333.969, 'duration': 3.963}, {'end': 2341.396, 'text': "And I don't know, port 21 or whatever goes to the Active Directory server.", 'start': 2338.073, 'duration': 3.323}], 'summary': "Router 2's internal ip is 192.168.1.1, external ip is 192.168.2.3, and it routes ports to specific servers.", 'duration': 57.788, 'max_score': 2283.608, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2283608.jpg'}, {'end': 2419.918, 'src': 'embed', 'start': 2386.487, 'weight': 7, 'content': [{'end': 2390.792, 'text': 'If you want it to be really secure, then you lock down all the ports other than the ports that you need to have open.', 'start': 2386.487, 'duration': 4.305}, {'end': 2393.375, 'text': 'If you want it to be less secure, you make it less secure.', 'start': 2391.293, 'duration': 2.082}, {'end': 2406.631, 'text': "But the main thing is, with the DMZ is that router number one it's going to have an IP address out, an external static IP address 207.1.1.1.", 'start': 2393.415, 'duration': 13.216}, {'end': 2419.918, 'text': "I guess the internal IP address of it will be 192.168.2.1, and so when traffic comes in it'll come here, it'll look for the port forwarding,", 'start': 2406.632, 'duration': 13.286}], 'summary': 'For optimal security, lock down all ports except necessary ones. dmz router has external static ip 207.1.1.1 and internal ip 192.168.2.1.', 'duration': 33.431, 'max_score': 2386.487, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2386487.jpg'}, {'end': 2466.965, 'src': 'embed', 'start': 2438.567, 'weight': 8, 'content': [{'end': 2442.109, 'text': 'So to make sure that you configure the default gateway correctly.', 'start': 2438.567, 'duration': 3.542}, {'end': 2447.273, 'text': "Again, if you don't understand what the default gateway is, go please take the TCP IP class, that'll explain this.", 'start': 2442.169, 'duration': 5.104}, {'end': 2456.921, 'text': "But basically the default gateway states where do you go and where does a computer look if it can't find what it's looking for on the local network.", 'start': 2447.534, 'duration': 9.387}, {'end': 2466.965, 'text': 'So here, for the VPN server and the email server, the Active Directory server and all the computers, the default gateway will be 192.168.1.1,', 'start': 2457.481, 'duration': 9.484}], 'summary': 'Configuring the default gateway is crucial for network navigation, with 192.168.1.1 as the designated gateway.', 'duration': 28.398, 'max_score': 2438.567, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2438567.jpg'}, {'end': 2528.166, 'src': 'heatmap', 'start': 2480.954, 'weight': 1, 'content': [{'end': 2485.195, 'text': 'All these computers here, default gateway, will be router 2.', 'start': 2480.954, 'duration': 4.241}, {'end': 2488.256, 'text': "Router 2's default gateway will be router 1.", 'start': 2485.195, 'duration': 3.061}, {'end': 2494.237, 'text': "And then everything sitting in the DMZ's default gateway will be router 1.", 'start': 2488.256, 'duration': 5.981}, {'end': 2496.097, 'text': 'Again, pretty simple, but just make sure.', 'start': 2494.237, 'duration': 1.86}, {'end': 2497.337, 'text': "Don't screw up.", 'start': 2496.137, 'duration': 1.2}, {'end': 2505.179, 'text': "If you make this email server's default gateway, this router up here, it just won't work.", 'start': 2497.998, 'duration': 7.181}, {'end': 2508.6, 'text': 'So you have to make it the closest possible router.', 'start': 2505.339, 'duration': 3.261}, {'end': 2514.086, 'text': "I hope all that mess made a lot of sense, but that's the first example of what a DMZ is.", 'start': 2509.58, 'duration': 4.506}, {'end': 2528.166, 'text': "Now the next example that we'll talk about is again, something that you will probably see that you can actually sell in the outside world.", 'start': 2520.424, 'duration': 7.742}], 'summary': 'Setting default gateways for routers in a network, emphasizing the importance of proper configuration to ensure functionality.', 'duration': 47.212, 'max_score': 2480.954, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2480954.jpg'}, {'end': 2620.621, 'src': 'embed', 'start': 2590.605, 'weight': 0, 'content': [{'end': 2594.289, 'text': "So you're going to use the first IP address for your first business,", 'start': 2590.605, 'duration': 3.684}, {'end': 2598.272, 'text': 'the second IP address for your second business and the third IP address for your third business.', 'start': 2594.289, 'duration': 3.983}, {'end': 2607.341, 'text': 'Now, since these are static external IP addresses, that means the first business can point all of their email traffic, all of their web traffic, etc.', 'start': 2598.653, 'duration': 8.688}, {'end': 2609.042, 'text': 'to this external IP address.', 'start': 2607.761, 'duration': 1.281}, {'end': 2615.609, 'text': 'The second business can point all of their traffic to the second IP address and the third business can point all of their traffic to the third IP address.', 'start': 2609.243, 'duration': 6.366}, {'end': 2620.621, 'text': 'So, all these three IP addresses come in to this one modem.', 'start': 2616.169, 'duration': 4.452}], 'summary': 'Three static external ip addresses assigned to three businesses for traffic routing.', 'duration': 30.016, 'max_score': 2590.605, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2590605.jpg'}, {'end': 2722.167, 'src': 'embed', 'start': 2697.293, 'weight': 1, 'content': [{'end': 2704.178, 'text': 'Each business then can have its own static IP address and basically all you do is you plug in a switch,', 'start': 2697.293, 'duration': 6.885}, {'end': 2711.838, 'text': 'pass the modem and then you plug the routers in, and now everybody here can do whatever they want.', 'start': 2705.293, 'duration': 6.545}, {'end': 2715.621, 'text': 'So business number one can have an email server and a web server.', 'start': 2712.038, 'duration': 3.583}, {'end': 2722.167, 'text': 'business number two they only have internet access and business number three is some weird, geeky company that does everything in the world.', 'start': 2715.621, 'duration': 6.546}], 'summary': 'Each business can have its own static ip address, enabling different services and access.', 'duration': 24.874, 'max_score': 2697.293, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2697293.jpg'}, {'end': 2815.027, 'src': 'embed', 'start': 2786.179, 'weight': 2, 'content': [{'end': 2790.482, 'text': "As I always say, always, always, always, don't use residential equipment for a business.", 'start': 2786.179, 'duration': 4.303}, {'end': 2792.504, 'text': "Don't, don't, don't, don't, don't, don't, don't.", 'start': 2790.662, 'duration': 1.842}, {'end': 2793.785, 'text': 'It is not worth it.', 'start': 2792.604, 'duration': 1.181}, {'end': 2794.586, 'text': "It's not.", 'start': 2794.245, 'duration': 0.341}, {'end': 2800.792, 'text': 'SOHO equipment, like I say, is better quality than residential equipment, but not as good as Enterprise.', 'start': 2795.507, 'duration': 5.285}, {'end': 2806.178, 'text': "So you're going to pay more for it than you will residential equipment, but you'll pay less than Enterprise equipment.", 'start': 2801.192, 'duration': 4.986}, {'end': 2810.122, 'text': 'Always buy SOHO business class equipment.', 'start': 2806.438, 'duration': 3.684}, {'end': 2815.027, 'text': "Like I say, even if it's Linksys, Linksys has business class SOHO equipment.", 'start': 2810.162, 'duration': 4.865}], 'summary': 'Use soho business class equipment, like linksys, for better quality than residential equipment but less cost than enterprise.', 'duration': 28.848, 'max_score': 2786.179, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2786179.jpg'}], 'start': 2193.828, 'title': 'Setting up dmz and port forwarding', 'summary': 'Covers configuring dmz using port forwarding, setting up two routers with specific port mappings, and emphasizing default gateway configuration and security measures. it also explains utilizing multiple static ip addresses to share a single internet connection among multiple businesses, enabling each business to have its own services and preventing hacking, all from a single internet connection.', 'chapters': [{'end': 2508.6, 'start': 2193.828, 'title': 'Configuring dmz and port forwarding', 'summary': 'Explains how to set up a dmz using port forwarding and configure two routers with specific port mappings, emphasizing the importance of default gateway configuration and security measures.', 'duration': 314.772, 'highlights': ['Configuring port forwarding for web server on router 1 Port 80 traffic from the internet directed to the web server with the static IP address 192.168.2.2.', 'Routing specific ports to router 2 Routing port 25, port 21, and port 47 traffic from router 1 to router 2 with the external IP address 192.168.2.3.', 'Importance of different subnets for internal IP addresses of routers Emphasizing the need for the internal IP address of router 2 to be on a different subnet (192.168.1.1) from the external IP address (192.168.2.3) to ensure proper functioning.', 'Configuring port mappings for services on router 2 Assigning port mappings on router 2 for email server (port 25), VPN server (port 47), and Active Directory server (port 21).', 'Security measures for the DMZ Discussing the option to secure the DMZ by controlling the open ports on router 2 based on security requirements.', 'Importance of correct default gateway configuration Highlighting the significance of configuring the default gateway correctly for each component within the network to ensure proper routing.']}, {'end': 2848.142, 'start': 2509.58, 'title': 'Utilizing multiple static ip addresses', 'summary': 'Explains how to share a single internet connection among multiple businesses by using multiple static ip addresses, a switch, and routers, allowing each business to have its own services and preventing them from hacking each other, all from a single internet connection.', 'duration': 338.562, 'highlights': ['By utilizing multiple static IP addresses on a single internet connection, businesses can have their own external IP addresses for email and web traffic, allowing them to have their own services without the risk of hacking each other.', 'Using a switch and multiple routers connected to a single modem enables businesses to share one internet connection while maintaining separate static IP addresses and services for each, providing a cost-effective solution for businesses with varying needs.', "It's crucial to use SOHO business class equipment instead of residential equipment for businesses, as it offers better quality and functionality than residential equipment, at a more affordable price than enterprise-class equipment."]}], 'duration': 654.314, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2193828.jpg', 'highlights': ['By utilizing multiple static IP addresses on a single internet connection, businesses can have their own external IP addresses for email and web traffic, allowing them to have their own services without the risk of hacking each other.', 'Using a switch and multiple routers connected to a single modem enables businesses to share one internet connection while maintaining separate static IP addresses and services for each, providing a cost-effective solution for businesses with varying needs.', "It's crucial to use SOHO business class equipment instead of residential equipment for businesses, as it offers better quality and functionality than residential equipment, at a more affordable price than enterprise-class equipment.", 'Configuring port forwarding for web server on router 1 Port 80 traffic from the internet directed to the web server with the static IP address 192.168.2.2.', 'Routing specific ports to router 2 Routing port 25, port 21, and port 47 traffic from router 1 to router 2 with the external IP address 192.168.2.3.', 'Configuring port mappings for services on router 2 Assigning port mappings on router 2 for email server (port 25), VPN server (port 47), and Active Directory server (port 21).', 'Importance of different subnets for internal IP addresses of routers Emphasizing the need for the internal IP address of router 2 to be on a different subnet (192.168.1.1) from the external IP address (192.168.2.3) to ensure proper functioning.', 'Security measures for the DMZ Discussing the option to secure the DMZ by controlling the open ports on router 2 based on security requirements.', 'Importance of correct default gateway configuration Highlighting the significance of configuring the default gateway correctly for each component within the network to ensure proper routing.']}, {'end': 3179.327, 'segs': [{'end': 2906.332, 'src': 'embed', 'start': 2867.778, 'weight': 0, 'content': [{'end': 2874.944, 'text': 'Remember, if you have email servers running, if you have web servers running, etc., the internet only cares about that IP address.', 'start': 2867.778, 'duration': 7.166}, {'end': 2877.766, 'text': 'So if you have a dynamic IP address and that IP address changes,', 'start': 2875.044, 'duration': 2.722}, {'end': 2882.891, 'text': "that means all your servers basically aren't doing anything until you go in and change configurations.", 'start': 2877.766, 'duration': 5.125}, {'end': 2883.712, 'text': 'Not a good thing.', 'start': 2883.231, 'duration': 0.481}, {'end': 2885.653, 'text': 'I talked about the DHCP.', 'start': 2884.452, 'duration': 1.201}, {'end': 2893.2, 'text': "So these little routers now, like I say, a router actually doesn't do a lot.", 'start': 2886.114, 'duration': 7.086}, {'end': 2898.785, 'text': 'So these routers are actually, they combine a lot more than just routing.', 'start': 2893.32, 'duration': 5.465}, {'end': 2901.548, 'text': 'One of the services they combine is the DHCP.', 'start': 2898.945, 'duration': 2.603}, {'end': 2904.871, 'text': 'So they automatically hand out IP addresses to the local area network.', 'start': 2901.588, 'duration': 3.283}, {'end': 2906.332, 'text': 'We talked about scope.', 'start': 2905.311, 'duration': 1.021}], 'summary': 'Dynamic ip changes can halt servers; routers combine dhcp service to assign ip addresses.', 'duration': 38.554, 'max_score': 2867.778, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2867778.jpg'}, {'end': 3000.625, 'src': 'embed', 'start': 2955.849, 'weight': 2, 'content': [{'end': 2965.413, 'text': 'We talked about port forwarding, so every single service on the internet requires its own port, port 80, port 25, port 21, port 47, etc.', 'start': 2955.849, 'duration': 9.564}, {'end': 2973.616, 'text': "So, basically, all you do with port forwarding is, if you have a server on your network, that's providing a service to the internet.", 'start': 2965.793, 'duration': 7.823}, {'end': 2980.879, 'text': 'you just tell the router if you have a web server, anything coming in on port 80 gets directed to this static IP address', 'start': 2973.616, 'duration': 7.263}, {'end': 2982.059, 'text': "It's that simple.", 'start': 2981.599, 'duration': 0.46}, {'end': 2986.901, 'text': 'Firewalls All a firewall does, really simple, basically, is it blocks ports.', 'start': 2982.539, 'duration': 4.362}, {'end': 2990.782, 'text': "So the idea is if you block ports, hackers won't be able to hack into your network.", 'start': 2987.021, 'duration': 3.761}, {'end': 2995.184, 'text': 'The problem is, like I say, is, if you have a very secure, stable network,', 'start': 2991.242, 'duration': 3.942}, {'end': 3000.625, 'text': 'then you can block all the ports and then open up the specific ports that you want opened, and everybody will be hunky dory.', 'start': 2995.184, 'duration': 5.441}], 'summary': 'Port forwarding directs internet traffic to specific services and servers, while firewalls block ports to enhance network security.', 'duration': 44.776, 'max_score': 2955.849, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2955849.jpg'}, {'end': 3117.18, 'src': 'embed', 'start': 3091.212, 'weight': 4, 'content': [{'end': 3098.654, 'text': "the more useful and the more ideas you'll have about how to use routers to make things more secure, to make things better for your client.", 'start': 3091.212, 'duration': 7.442}, {'end': 3102.395, 'text': 'When you first start out, just start with one router and play with that.', 'start': 3099.014, 'duration': 3.381}, {'end': 3105.116, 'text': 'And then you might try the whole DMZ routine.', 'start': 3102.735, 'duration': 2.381}, {'end': 3108.617, 'text': 'And then you might try multiple different stuff.', 'start': 3105.416, 'duration': 3.201}, {'end': 3112.378, 'text': 'Basically, using routers is as much art as it is science.', 'start': 3109.057, 'duration': 3.321}, {'end': 3117.18, 'text': 'What do you think is going to make your network more secure?', 'start': 3112.699, 'duration': 4.481}], 'summary': 'Experimenting with routers can enhance network security and efficiency, leading to more ideas and a better client experience.', 'duration': 25.968, 'max_score': 3091.212, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig3091212.jpg'}], 'start': 2848.142, 'title': 'Networking and soho routers', 'summary': 'Covers the importance of static ip addresses, routers in providing dhcp and dns services, port forwarding, firewalls, and port triggering in network security, as well as enabling logs, upgrading firmware, and understanding client needs for soho routers.', 'chapters': [{'end': 3021.073, 'start': 2848.142, 'title': 'Networking essentials', 'summary': 'Covers the importance of static ip addresses for servers, the role of routers in providing dhcp and dns services, and the functions of port forwarding, firewalls, and port triggering in network security and accessibility.', 'duration': 172.931, 'highlights': ['The importance of static IP addresses for servers Static IP addresses are crucial for servers like email and web servers to ensure consistent accessibility from the internet without requiring frequent configuration changes.', 'Role of routers in providing DHCP and DNS services Routers not only handle routing but also provide DHCP services by automatically assigning IP addresses within a defined scope and offer DNS services for domain name resolutions, simplifying network management.', 'Functions of port forwarding in directing internet services Port forwarding allows routers to direct incoming traffic to specific servers on the network, facilitating services like web hosting by directing traffic on designated ports to the respective servers.', 'The basic role of firewalls in network security Firewalls primarily block ports to prevent unauthorized access, but the challenge lies in finding the right balance between security and allowing access to essential services in a modern, interconnected world.', 'Significance of port triggering for network security Port triggering is briefly mentioned as part of the discussion, indicating its relevance in enhancing network security, although not elaborated further.']}, {'end': 3179.327, 'start': 3021.293, 'title': 'Understanding soho routers', 'summary': 'Covers the importance of enabling logs, upgrading firmware, and experimenting with routers to enhance network security and stability, emphasizing the need to understand client needs and network architecture.', 'duration': 158.034, 'highlights': ['The importance of enabling logs and upgrading firmware to enhance network stability and security, emphasizing the need to understand client needs and network architecture.', 'The significance of experimenting with routers to understand their functionality and improve network security and stability.', 'The emphasis on getting a feel for the need for multiple routers based on networking knowledge and client requirements.']}], 'duration': 331.185, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/w44J7CN26Ig/pics/w44J7CN26Ig2848142.jpg', 'highlights': ['Static IP addresses are crucial for servers like email and web servers to ensure consistent accessibility from the internet without requiring frequent configuration changes.', 'Routers not only handle routing but also provide DHCP services by automatically assigning IP addresses within a defined scope and offer DNS services for domain name resolutions, simplifying network management.', 'Port forwarding allows routers to direct incoming traffic to specific servers on the network, facilitating services like web hosting by directing traffic on designated ports to the respective servers.', 'Firewalls primarily block ports to prevent unauthorized access, but the challenge lies in finding the right balance between security and allowing access to essential services in a modern, interconnected world.', 'The importance of enabling logs and upgrading firmware to enhance network stability and security, emphasizing the need to understand client needs and network architecture.']}], 'highlights': ['SOHO routers combine multiple logical devices into one physical device, providing functions such as routing, switching, firewall, and VPN, making them suitable for small office environments with fewer devices.', 'SOHO equipment is suitable for offices with 10 to 20 people, offering better quality than residential gear and costing less than enterprise equipment.', 'SOHO equipment allows for web GUI administration, making it user-friendly and accessible, unlike enterprise equipment that requires command line interface (CLI) and has a steeper learning curve.', 'A Soho 48 port switch costs $800-$900, while an Enterprise 48 port switch costs $1,500-$2,000, providing a significant cost difference.', 'SOHO routers are viable for offices with up to 50 users, eliminating the need for expensive enterprise-class routers, such as a $5,000 Cisco router.', 'Understanding the importance of external IP address for accessing internal network from the outside world.', 'Hosting servers like web, VPN, and email servers in small business configurations.', 'The chapter emphasizes the importance of having a static IP address for small business servers or exchange servers, highlighting the potential issues with dynamic IP addresses.', 'The benefits of using DHCP for IP address allocation is explained, highlighting the automatic assignment of IP addresses to computers and the ability to specify the range of addresses to be allocated within the network.', 'Configuring servers as DHCP servers is crucial for larger networks like small business servers.', 'DNS plays a crucial role in translating computer names into IP addresses on a TCP/IP network, enabling efficient communication between computers.', 'The Linksys RV016 router series offers internet redundancy by allowing up to four different internet connections to be plugged in, ensuring uninterrupted internet access for the office.', 'The specific model discussed, the RV016, can accommodate up to four different internet connections, such as Comcast, DSL, and Wi-Fi, providing a reliable failover system for internet access.', 'This particular router series, the RV016, is available in four-port, eight-port switch, and 16-port versions, offering flexibility in network setup and expansion.', 'It offers redundant internet connections with Comcast business class internet priced at $60 and Verizon business class internet at $30, allowing for a redundant internet connection for $100 a month.', 'For businesses dealing with 10 to 20 people, $100 a month for redundant internet connections is vital compared to the potential loss if the primary internet connection fails.', 'By utilizing multiple static IP addresses on a single internet connection, businesses can have their own external IP addresses for email and web traffic, allowing them to have their own services without the risk of hacking each other.', 'Using a switch and multiple routers connected to a single modem enables businesses to share one internet connection while maintaining separate static IP addresses and services for each, providing a cost-effective solution for businesses with varying needs.', "It's crucial to use SOHO business class equipment instead of residential equipment for businesses, as it offers better quality and functionality than residential equipment, at a more affordable price than enterprise-class equipment.", 'Static IP addresses are crucial for servers like email and web servers to ensure consistent accessibility from the internet without requiring frequent configuration changes.', 'Routers not only handle routing but also provide DHCP services by automatically assigning IP addresses within a defined scope and offer DNS services for domain name resolutions, simplifying network management.', 'Port forwarding allows routers to direct incoming traffic to specific servers on the network, facilitating services like web hosting by directing traffic on designated ports to the respective servers.', 'Firewalls primarily block ports to prevent unauthorized access, but the challenge lies in finding the right balance between security and allowing access to essential services in a modern, interconnected world.', 'The importance of enabling logs and upgrading firmware to enhance network stability and security, emphasizing the need to understand client needs and network architecture.']}