hi there!

i recently installed ubuntu to my pc along with my previous OS (i.e. windows vista 32-bit)
it was grt. but i cant figure out one problem :---
i was not able to connect to my broad-band connection. actually in windows i had to enter a user name and a password to connect to internet. but in ubuntu i cant find any such option.
it shows me that i am connected to a wired network, but i was not able to surf the net in firefox.
please someone tell me how to connect to the net by giving a username and a password in ubuntu.
thank you!!!
