hmm I have roadrunner internet and when I asked for them to change my ip address all they had to do was change it from their location, not mine.
They sent the ip address out to my house and I simply receive it via cable modem. There's nothing that I can do to "change" the ip address because they give it to me. If I wanted to change it myself, I would have to walk over to their location and switch settings on their servers.
Ok so you have the incoming cable from your ISP and that's going to your cable modem. Is your modem lighting up showing you that their is an actual incoming internet connection. If it is then you should be able to get internet access. If not, then comcast has to send out a different ip address to your lcoation...nothing you can do about that.
After you connect the CAT-5 Ethernet Cable to the PC Ethernet card, open up a command prompt. Do this by going to start and then go to run, then type in cmd and press enter. If you have vista, press start then type in cmd in the search box, then press enter.
In the black command box, type in ipconfig/all . What kind of information are you getting. Do you have default gateway, dhcp server, dns servers ?
Thanks , hope to hear back from you soon.
Edited by cheeko, 24 June 2008 - 08:54 AM.