Finally i got a chance to use the awesome LAN at the college campus and it was a very good time to update the packages, but there was a problem it had a proxy, so i typed man yum and was pointed at man yum.conf and there it was a simple solution, all the you need to do is just edit the yum.conf file as root
type
su
enter your root password now type
nano /etc/yum.conf
here add a line
proxy = http://address:port
replace the above code with the address you need like 172.16.19.10 and port 80 in my case and all will work just fine
Enjoy!!!
Ankur Shrivastava