Understanding SOHO Routers
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- เผยแพร่เมื่อ 6 ก.ย. 2024
- 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
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I love how you fully explain things and don't assume the audience knows. That's a gift of a good teacher.
You teach better than anyone I have so far found on TH-cam. Thank you for teaching us. You are quite intelligent.
Not too easy, and the harder topics thoroughly explained: you are a natural born teacher!
Your videos not just educate but I literally enjoy learning from you sir. God bless you. ❤️ Please make a series on how to build a small network using manageable switch. So that we can actually see the professional or lets say a lab environment. Cheers
Thankyou Eli, the computer guy. I truly appreciate this presentation since it answer number of questions that have been pondering my mind. Especially disabling DHCP on router when there is an actual DHCP server on the network and the DMZ technology. Thanks again.
Thanks Eli for another understanding. You've made me understand more than what I've been thought in class. I'll keep watching your videos for more understanding
Awesome teaching classes! I have been watching your videos and I just started in the I.T. field. I have learn`t lots from you. Thank you and keep on making awesome videos Eli.
@immuneDay I've never even heard of the before..?
I set up a static IP address a month ago for my home computer, it's very very useful.
Eli, again great job. I will be doing is more than once. The router 'thing' always was a phamtom box to me. I now have a better understanding and will need to do this again.
I do have some application questions for a specific need, but I will continue doing the videos to see if it is covered before I submit the question. Thanks again for your time.
Thank you so much Eli! I never knew you could have multiple External IPs from 1 modem
When configuring two Routers like he did for the DMZ part of the video. Are you supposed to disable DHCP in one of the routers?
Unline DHCP and DNS, you can layer multiple Firewalls on a network, which is how a DMZ works. The first firewall has very loose rules to allow the webserver and/or public access connections to work, but then the 2nd firewall with all your important systems behind it is a much stricter firewall that blocks everything that the first firewall allows that you don't want to have access to your important systems.
Cool, thanks! Nice to know I haven't completely missed the mark.
Guys you do a great job, for beginners and for advanced users too.
I want to thank you a lot
great job again!
Very good stuff presented in a manner easy to understand by non network engieers
port 3 some geeky company that do everything in the world......funny....
by the way great work... keep doing... it is helping students alot......
Mr. Eli, thanks for this lesson on SOHO routers.
I learnt alot of cool stuff man.
Hi Eli, Love your videos. I just wanted to say that I recently got a Ciaco 3560 for free
every minute worthet to be watching
With the DMZ example, you may wonder how people behind the second routeur still get access to internet as a rule was set on routeur 1 to redirect port 80 to the webserver. Here is the answer : stackoverflow.com/questions/2957757/how-can-an-application-use-port-80-http-without-conflicting-with-browsers
Loved the explanation, it's great for beginners. Thank you so much!
I lack words, you are the best.
Sad to hear eli the computer guy has slipped again into a relapse.he was seen in downtown Baltimore shooting heroin about a week ago.were here thinking of you eli.best wishes buddy we miss you
As for the static IP address, correct me if I'm wrong but you need to make sure your router has a static IP address so that other hosts on the internet can find your router and on top that you need to have to hard code a static IP address on the server you have on your LAN.
thanks for your honest review of dual wan routers. I was considering it for my home. I'm in Ottawa, Canada. I have rogers for my internet and Bell for my regular phone line. I'm a retired IT guy and I thought it would be neat to have load balancing and failover but I like your comment "you don't need to worry about that stuff". I mean how neat would be? I'd have to buy a new router (like a Cisco RV042) and configure it. Bell has a deal where it is offering internet for just a bit more than I'm paying for a regular phone line. My wife streams a lot of shows and I don't need problems where the stream is divided between the two internet providers.
Dual WAN is like a lot of things in tech... it sounds f'ing awesome on paper, but actually deploying and maintaining it leaves much to be desired.
"start with 1 router then play with that, then use the DMZ routine.." hahaha i exactly did the same thing!
but this caught me "using routers is as much art as it is science" :) that was awesome
why the jacks for redundancy are rj45 instead of a mix between dsl, cable, fiber cable?
Dude thank you! I've got a network admin opportunity just by watching your videos LOL
虽然只能听懂部分，但加上板书真的不错，谢谢ELI。
I need a recommendation for a switch after the modem. The setup is like you were talking about for multiple businesses. Each business only uses the internet to surf the web and they use it 24/7 taking up pretty much all of the available bandwidth (heavy traffic). No servers, no email, none of that. The problem I've noticed is an unmanaged switch like the TP-LINK TL-SG108 Unmanaged 10/100/1000Mbps 8-Port Gigabit Desktop Switch doesn't seem to work very well. Users will get browser crashes while viewing media rich webpages (videos, music). The netgear GS116 v2 seems to work better. I'm not sure if the larger buffer size is helping but the users seem to have less browser crashes. I'd like to get a switch that can handlethe 5 routers & 25-35 users easily doing what I explained. It seems like the switch might be the issue here. I'd like to avoid stepping up the internet package if possible. I purchased a HP 1920-8G Managed L3 Switch - 8 Ethernet Ports & 2 Gigabit SFP Ports thinking that this might solve the issue but I have no clue what I'm doing when it comes to enterprise level gear. I haven't tried to use it yet. I'm not sure if it will function like an unmanaged switch if I just try to plug and play. Any help is appreciated. I'm not an IT networking guy, but I can understand quite a bit of the basic things like in this video. Setup looks like this - comcast business modem - switch - 5 routers (1 ISP static assigned to each) - 7 computers each router
Just look for a 9db wifi antenna, it will more than double the strength of your signal, you will probably discover even more open connections.
@immuneDay if i understand you problem
the idea is the static ip point to your router but when it get to the router it does not know were to go
so you have to configure the NAT in your router
for example if your web server ip is 192.168.1.100 then you have to tell you router to forward the coming connections on port 80 to the ip 192.168.1.100 this way it will find your web server
Hey Eli! I have a question about a customer of mine who has a small small small office of four computers one is the main computer that has a network share drive that is striped off fours drives....three computer (people) are accessing that same drive at the same drive changing files through Cad programs.... on the main computer with the network drive share is has crashplan running for that shared drive also. now when i added synology to the mixure of meyhem it slowed their cad program being able to access and make changes to that one networked shared drive... now they have a Linksys E3500 soho router 1gig 4 ports on it they also have cat5 cables connecting these computers what changes to the network would i have to do in order for them to simultaneously access that shared drive without lagg, and have crashplan and synology backing up that same drive... currently i fix was run the backups at night when no one is using the network... but the problem also is when my boss wants to access synology its doing overnight backups and he doesn't have the most recent files on that synology because by the time he gets home synology it still backing up off that main computer that is left on overnight? oh and all the computers are running Windows 7 pro 64bit.
Eli, You are doing a great JOB...Keep it up....Very nice videos
I learned a lot from you. Thank you
Eli great job. I would like to know how the SOHO ROUTER deals with a redundant network in relation to the external IP. I am guessing the router comes with a WebGui that can help set as many external IP we made redundant a static IP.
Eli,
I live in an apartment that comes with wifi already. The only problem is the signal doesn't reach into my bedroom, and the routers must be in the ceiling or something because I have no access to them in my apartment. What type of networking equipment could I buy to help with this problem? Right now my solution is to plug into ethernet every time, but sometimes you don't want to have a jumble of cords in your bed while you're watching netflix before bed.
Thanks
If I wanted to give the IP Address to the client in business 1 or 2 or 3 then how would that work because we share the network by having 3 different IP Addresses for example 207.55.4.1, 207.55.4.2, 207.55.4.3 so please explain that. Thank You.
I agree with you, on the learningcurve about Cisco IOS, but aren't you forgetting SDM / Cisco Configuration Professional?
How do you configure the DHCP to give a certain scope?
Also, is there a way to turn off the DHCP of a router before connecting it to a network (as to not interfere with the DHCP already running on a server)?
thank you man ..you are making everything easy keep it up
got it. say i am using the internet in his example. when i send a message to a web browser ther're are two ports in my message. one for the destination which will be port 80. and then one for my local machine to recieve messages back from the server, which will be something random. so when i get messages back from some web server they do not come back on port 80. rather, the web servers sends them back on the port my operating system chose, and told the server to send back via.
In the multiple IP addresses through 1 modem scenario, would the switch require 3 VPNs to ensure the 3 routers can't communicate with each other?
I did more research for this and you are spot on!
You are a starrrrrrrrrrrrrrrrr! you have saved me so much pain. I appreciate your videos.
Brilliant and appreciated for ur knowledge sharing !!!!
Hi Eli!!! what about a lesson of some features like dynamic routing(distance vector, link state and hybrid), NAT, PAT, routing table. Thank you.
Thanks for all the videos ... there is a lot of value in this content!... :)
subscribed already! :)
Doesn't a firewall exist on a windows sbs, and also on a router? OR even just a stand alone firewall that may connect to the router?
How does this work with multiple firewalls? Does it work the same as DHCP and DNS where only 1 thing can run the firewall and not all of them?
What if you have a home web server and you put the server's IP address in the DMZ? Are there any pros or cons to doing this instead of using port forwarding?
good stuff..this guy make sounds really easy..
Good videos..I just hate the fact that the playlist is out of order.
perfect job Eli. thanks a lot
I still don't see a problem with how I reserve 192.168.0.199 and 111 for my personal server and WOL, but I will take note for other setups
That internet redundancy point was important.
I don't have the chance to get into the router config, so there is something not quite clear. If I mount a server, the IP assigned is something the ISP give to me or something I can set? And if it's something I can set, it's enough to write a value that is outside of the dynamic-ip-band? (I mean, if it's enough for the router to know it shouldn't change it). Any ideas are welcome!
Typically, you get 1 public IP address from your provider. Your router allows multiple devices to share that 1 public IP address through something called NAT (Network Address Translation). So if you were to plug your server to the router, it should get a dynamic private IP address through DHCP from the router. That is unless you specifically configure your router with a private static IP.
Jose Javier Flores crystal clear, thanks!
@@JJFlores197 sorry, but yet, how can I access my server from the external world?
@@mrnobody1321 You would setup something like port forwarding on your router. This will allow you to forward whatever ports you need (http/https, etc) and be able to access it from outside of your network. However, extreme caution has to be taken as your server will be exposed to the internet. You want to make sure you have a good firewall setup, keep up to date with any updates and patches and reduce your attack surface as much as possible.
Awesome.
Thank you very much
Thanks Eli, learnt a lot
From what you're saying about routers in this video, and from what you said about switches in the previous video...if I don't have any servers on my network that I need to forward ports, then I don't need a router. A switch will get the packets where the need to go just fine with minimal collisions, right?
Now, I'm just asking out of curiosity. I don't plan on running my network without a router connected to my cable modem, bleh.
+Hungry Guy Router converts the external address(es) to the internal network addresses. A router contains a DHCP server to give out unique *internal* IP addresses to each host. Then it directs traffic between the outside world and each host by knowing where packets come from and where responses go back to.
If Host-A clicks a TH-cam video, the stream is sent to Host-A and not to Host-B. If Host-B is doing email, those packets don't go to Host-A.
(If Host-A were running their wireless network card in "promiscuous mode" with an app under Linux, then they could "sniff" all the traffic going to other hosts -- that's how people would crack WEP or WIFI.)
Here's where you don't need a Router -- if you have ONE Host computer connected directly to the Internet (cable modem), grabbing the external real world IP address --- that is normally assigned to the outside or WAN port of the router by the ISP (cable modem). You could put a switch between the Host and Internet (cable modem), but that wouldn't help because you still only have ONE IP address.
I suppose you could have 3 computers and buy 3 unique IP addresses assigned to 3 hosts by MAC address (I think).
It is more dangerous to be direct on web without a Router, because the fact that Router has internal addresses that are *not directly accessible via the Internet*, that is a kind of de facto firewall. Nobody can network into your C drive via Microsoft sharing unless they break into the Router. Bad guys have to trick you into installing some malicious app.
(Class-C private addresses --- 192.168.xxx.xxx -- there are other private address ranges -- those addresses are not routed across the Internet, so nobody can directly connect to your host behind a firewall.)
In order for your hosts to purposely share Services, you have to specify open ports on the Router for specific games etc. on the Internet, but you aren't sharing ports for Windows folder sharing or printer sharing on the Internet.
Great lessons! Thumbs up!
If you plug multiple internet connections from different ISP's into one router, will there be two different IP's, sort of like the shared internet? Or will the external IP be the same?
This probably wont work on your home router. But on a real router you would have more than one external IP yes. The interfaces facing the Internet would all have different IP's. Your router then have a routing table on where to decide where to send different traffic. Maybe some traffic are sent over one ISP, and some over another. This is a huge topic and cannot be explained over a single youtube comment :-)
Lookup topics on routers and routing, nat, wan.
Alright, thanks for the reply.
wouldn't an IFTTT configuration beable to resolve this problem of a dynamic ip?
well explained
Why don't you have to port forward to use skype? And how can multiple people on a network use it at once?
It supports UPnP, if it is enabled on your router, which means Universal Plug'n'Play. In essence it does all the port rewarding for you.
However in a business environment where security maybe more important, and you may be more likely to get targeted UPnP may be disabled to prevent vulnerabilities allowing the network to be hacked.
@219garyind yes and also to cut down on virus infection getting into the network
I run a private server off of it, static IPs make every thing much more simple. Plus, for some reason, if I'm connecting from outside my home network with the server dynamic, it doesn't make a reliable connection. Not sure why exactly, but I've never had a problem with new devices on the network with a static IP set up on one computer. My external isn't specifically 'static' but it hasn't changed in all the time that I've had it so it doesn't really matter for me to buy an external static IP.
Outstanding.
Hi Eli,
I've been watching your videos and thumbs up mate !!! I have a question in this Video.. On the Router 2 is the DHCP Server also turn on?. Sorry I'm quite beginner in the Networking. Thank you
My understanding of it is that DHCP assigns IP addresses, but DNS converts a name query into an IP address that can then be used to establish the connection. But the DNS doesn't assign any IP addresses to devices, it just passes information along, whereas DHCP doesn't pass information along, but it assigns an IP address to devices. It would be good if someone else could confirm this for me though.
great video. thanks eli
how to use one server static IP in two different isp for load balancing
so is there a seperat port for when you use remote desktop or is that done a different way?
Eli your way to good man,thanks for the video's
I have questions:
I am using Linux window for the first time because of my PhD research, my research can be solved by SPECFEM3D Cartesian software package, it is simulation for the investigation of an Earthquake effect propagation through topography variations. please, tell me how save and a software package after download and help me how to configure using a Linux commands. I have been learning the introduction part and basic Linux commands from your impressive and easy understandable lecture through youtube. Thank you so much for your help!!!
I hope you figured it out
sir how can i connect my dvr to mada soho router
dvr ip is 192.168.1.20
I dont understand something
Ah ok cool. You could make sure you won't have issues by setting the scope for your DHCP server to not include your servers's IP, so that it can never give out the same IP to other devices. (even though apparently that hasn't happened yet). And hope your external IP never changes ofc ^^
thnx a lot sir
I have a question about the DMZ segment. If the router for the DMZ forwards everything using port 80 to the web server, how will people connected to the wifi receive h t t p content? Thanks anyone in advance who is willing to answer.
i ben tryna figga dis shit out fo sum ike 3 fuckin dayz now smh!!! thanx dawg dis tha bess vidio i seen yet!! wher u from/wher u teach at?
very informative
what is the model of the linksys router he has, or could some recommed one good SOHO router with 2 WAN ports and firewall capabilities
Can someone please explain to me why DHCP is cheaper than Static Configuration? Does it have something to do with labour cost?
zhen yu DHCP will automatically assign an ip address to connecting clients. Otherwise you'd have to do it manually, hence why DHCP is cheaper
LOVE YOUUUUUUUUUUUUUU !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
dats great my guy
Tha'ts on the DMZ Section Around 40:40 Time of the Video
you are the best thank you
relay its very useful information
Nice
Thank you!
Thank You Good Friend
Thanks
thanks alot
Under Windows NT 4.0, the Microsoft DHCP server would shut itself off if there was another DHCP server on the network. As of Windows 2000, this is not true anymore. If you turn on your router's DHCP server, Windows Server will not back down as it did under NT 4.0. Try it and see for yourself.
35:38 why isnt router1 just modem in this case ?
Awesome!
Me Have 1 Question!!!! :D
1. DHCP And DNS, What happens if both are enable? DNS gives your PC name a IP? DHCP gives a IP? Why use DNS then? if DHCP does it all?
You look like one of my uncles or someone i know. I am from rivers state.
He's recommending to buy a static EXTERNAL IP address for your router (if you want to host web content from behind it), not setting it up for your workstation (home PC). How is a static IP for you home PC more upseful than a dynamic one assigned to you the DHCP server in your router? I believe static IP's can cause problems when several devices connect to your network and you DHCP server isnt rdy forit, unless you manually all give them a static IP everytime one tries to connect to your network.