Understanding SOHO Routers

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

Category:

Science & Technology

Tags:

• understanding
• soho
• routers
• 720pH

[immuneDay]

recently i found myself in a situation where ISP was providing a static IP adresses, but not routable IP addresses. Basically if ISP uses a WAN and has NAT enabled on their servers, even if they give you static IP, it doesn't necessarily mean it can be accessible from the internet. Dunno does that happen in US, since I live in Europe and here things like that are very common (especially with small, local ISPs and WiFi point to point connections)

[elithecomputerguy]

@immuneDay I've never even heard of the before..?

[219garyind]

@tczblood yeah that's true,good info thanks

[2531599]

thank you so much.you are the best instructer on youtube.

[immuneDay]

@algnadjib i realize what port forwarding is, but as i said, ISP has router in his base routing from 208.x.x.x to 10.x.x.x, and i, as a customer, am given a static ip of 10.x.x.x (+ dns servers etc) that i shall put in my small, wifi router at home, which then routes that 10.x.x.x to 192.x.x.x in my subnet.There are pros and cons of that, for example security is built in, no way hackers can directly scan your machine, but you have no control whatsoever, unless you pay extra 5$ every month

[algnadjib]

the best

[algnadjib]

@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

[immuneDay]

@elithecomputerguy my best guess is that it allows ISP to use "Static IP" in their marketing campaigns but at the same time, use one static IP for couple of their clients and save costs. That way, in order to have a home web server you have to pay 10$ for static ip + another 10$ for publicly visible IP only for you. In this manner static IP doesn't really give much, only that you will always be visible on the web as same person...Its worth knowing because its becoming a common strategy...

[tczblood]

@219garyind yes and also to cut down on virus infection getting into the network