Connecting to internet under Linux

[kryptech.net]

I built my computer with an internal winmodem, and I got an external modem that works for linux I set up the modem to connect to the internet and it works but the DNS server IP addresses do not seem to work, I can acsess sites with the IP addresses of them but I would like it very much if anyone had any suggestions. Im using KPPP and already typed in my ISP's Primary and Secondary DNS IP addresses but Mozilla just says it cant resolve the host, and Konqueror says it cant find the page

[stuka]

What I'd do if I were you is avoid the GUI part, and look at the file /etc/resolv.conf . This is mine from one of my boxes at home nameserver 24.28.99.62
nameserver 24.28.99.63
nameserver 24.28.99.61
This file tells your system where to look for DNS. If the GUI isn't correctly setting this up, then it won't work.

[kryptech.net]

I can ping the IP but when I use nslookup I get this:
;; connection timed out; no servers could be reached

[stuka]

Well, that's what resolv.conf is for - it tells your DNS lookup routines what servers to use. Is there anything IN your resolv.conf file?

[kryptech.net]

yes:
nameserver 12.5.165.3
nameserver 12.127.17.72