I am using Ubuntu 11.04 desktop edition mahcine. This machine is behind proxy server and content filter. I tried adding the following parameter in /etc/apt/apt.conf but it was not working after adding the ubuntu.com and the sites which are there in the sourcelist to content filter it started resolving the repo.
Now, the problem is the repo domains are resolving by doing apt-get update but not updating it.
Please help me.... Really this sucks.. I am finding this problem from last 2weeks... Please help....