The way you have it hooked up where the internet works is wrong. The router is then just acting as a switch.
Your modem is handing out DHCP and everything is pointing back that way and that is how you are still getting on the internet.
The reason you are not getting internet when you plug it in the INTERNET port of the router is because both the modem and router are using the same IP addressing scheem.
You can do one of two things,
1. go ahead and do a hard reset on the linksys (push and hold reset button on for 10sec located on the back while the power is on),
- After a reset has been done, hook the router directly to one of your computer using ports 1-4, do not connect anything else
- Access the router by opening up the web browser and typing 192.168.1.1
- username is blank, password is admin
- on the setup screen which is the default page go down to where it says DHCP, 192.168.1.1 and change it to 192.168.20.1
- hit save on the bottom
- then go ahead and power everything down
- hook everything up, Wall->modem->router(internet port)->computer
- turn everything on given 30 sec between each boot starting with modem->router->computer
- internet should work after this,
2. Put the modem into bridge mode (call ISP to walk you through),
- set the router up with proper username and password to make the internet connection (again call ISP for this info)
93 Mustang: Stock w/Vortech S-Trim
I drive a car that looks fast but seems to be slow...
But traction would help