I have a Compaq Presario 2100 laptop that I was able to successfully configure to dual boot RedHat 9.0 and WinXP home. I've been a Linux user for approximately 6 days now, and have developed a problem with my internet connection. I can successfully connect to my university's network by browsing through servers, and mess with people's shared folders, I cannot access any internet websites. I continually get a "Could not contact host." error message. I have messed with my firewall configuration, not disabling it, but ensuring that the level has not changed from medium, deleted and re-installed my ethernet adapter, which I set to automatically resolve my settings, tried manually setting myself up to my university's network (I think), and everything else I could think of. I have rather run out of ideas, and wonder if anyone has any advice for me?
Addendum: I have a wireless 802.11b card that I use with my Windows XP when in class. I booted up RH in class, without an ethernet connection, but with the wireless card inserted, to demonstrate some rudimentary operations for someone that was curious about Linux, and I believe this event may be responsible for disabling my internet. What's is the likelihood of this being correct?

Have you set up your proxies? Universities and schools usually use proxies rather than direct internet connection.

I shall try that immediately.

I instructed Linux to detect my proxy, but I still cannot resolve any hosts.