I can't browse Web except 1 server and Skype ???

Hi

I have strange problem. After installing 11.1 my wireless internet connection worked fine with KNetworkManager. I went to Campus and set up wireless internet connection there(kvpn and Cisco VPN). When I came back Home, KNetworkManager connected to my Modem/Router with no problems. But!!! Skype has connected with no problem and I can chat, but Pidgin cannot connect. When I started Firefox I can just access pages on my Campus server, from Home. Is that coincidence? Because all other pages i can’t acess, like I am offline, but KNM is connected normaly. Is there some options where all servers (Web Pages) are blocked, but just my Campus server? And why Skype connect and Pidgin not? Almost forgot, Thunderbird works also, i can read Mail and News.
Please Help me. Thanks

did you check your DNS?

I am new in this stuff. Where/What is DNS?

Just type the following to see your DNS servers (Name servers):


cat /etc/resolv.conf

Type the following to see whether name resolution is happening or not:


nslookup www.oracle.com
nslookup www.opensuse.org

I have found a solutin. I just deleted 2 files in etc/ resolve-conf and resolve.network.conf and it working fine now. but every time i came home from campus i have to delete it again