Last night at a house with a old linksys router and a comast dsl modem with voip, I had a very frustrating time trying to get two computers online.
First I thought it was one of the computers, messing with the router (just from experimenting). Then, since there was always internet when a computer was plugged directly into the modem (after rebooting the modem), I thought it had to be router. Then when I kept getting Router Status screens that said we had good IP's both inside and outisde the router (but the computers had no internet), I thought it had to be the modem.
I think what made it so hard for me was that finally I realized that the "router status" screens were not updating. There were cases where my router said I had good IP's both inside and outside of the modem, and I unplugged the wan cable from the router, and hit the browser refresh button, and clicked the Router Status page refresh button, and even restarted the router, and the browser Router Status page would not update the new status. I even closed the browser and deleted temp internet files thru inetcpl.cpl,and restarted the browser. The same was true when I went from having no internet to finally connecting (for a while) - it would take five to ten minutes for the Router Status page change. Likewise the DHCP Clients table took forever to show changes.
So at that point I got very frustrated with the router, and plugged in my own old linksys router. Same issue!
Any ideas how to get the router status page to update faster?
FYI I was using firefox.