check if you can ping an IP (188.8.131.52 aka www.linuxquestions.org
If not, you're problem is elsewhere.
Check all relevant settings with redhat-config-network (it's on the RH9 cd's if you didn't install it).
[PS, edit]: Do you run your own DNS server? If not, call your ISP to ask for the IP's of the
nameservers if you don't already know them.