/etc/apt/sources.list

Err http://repo.offensive-security.com binary/ Release.gpg                     
  Could not connect to repo.offensive-security.com:80 (208.68.239.28). - connect (110: Connection timed out)
Err http://repo.offensive-security.com/dist/bt4/ binary/ Translation-en_US
  Unable to connect to repo.offensive-security.com:http:
Ign http://repo.offensive-security.com binary/ Release         
Ign http://repo.offensive-security.com binary/ Packages
Ign http://repo.offensive-security.com binary/ Packages
Err http://repo.offensive-security.com binary/ Packages
  Unable to connect to repo.offensive-security.com:http:
W: Failed to fetch http://repo.offensive-security.com/dist/bt4/binary/Release.gpg  Could not connect to repo.offensive-security.com:80 (208.68.239.28). - connect (110: Connection timed out)

W: Failed to fetch http://repo.offensive-security.com/dist/bt4/binary/en_US.bz2  Unable to connect to repo.offensive-security.com:http:

W: Failed to fetch http://repo.offensive-security.com/dist/bt4/binary/Packages.gz  Unable to connect to repo.offensive-security.com:http:

E: Some index files failed to download, they have been ignored, or old ones used instead.