Thanks for the quick reply, however I thought 'apt-get update's inability to contact the archive servers was also the reason I am also having trouble using 'apt-get install' to install anything. I have also been trying to use 'apt-get install' to install nmap and I am still getting each time I try a "E: Unable to locate package nmap" error. Do you know why this error is occurring.
Its both. However it seems to be able to navigate the proxy as I was able to download packages straight from the archives using 'wget'. I also added the following lines to the .bashrc file to make sure it could authenticate. However this has had no effect.