I am behind a proxy. Every time I execute the apt-get update command, this is the output on the screen
Err http://extras.ubuntu.com trusty InRelease
Err http://extras.ubuntu.com trusty Release.gpg
Unable to connect to extras.ubuntu.com:http:
Err http://security.ubuntu.com trusty-security InRelease
Err http://security.ubuntu.com trusty-security Release.gpg
Unable to connect to security.ubuntu.com:http: [IP: 91.189.91.15 80]
Err http://in.archive.ubuntu.com trusty InRelease
Err http://in.archive.ubuntu.com trusty-updates InRelease
Err http://in.archive.ubuntu.com trusty-backports InRelease
Err http://in.archive.ubuntu.com trusty Release.gpg
Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.149 80]
Err http://in.archive.ubuntu.com trusty-updates Release.gpg
Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.149 80]
Err http://in.archive.ubuntu.com trusty-backports Release.gpg
Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.149 80]
Reading package lists... Done
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-updates/InRelease
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-backports/InRelease
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/InRelease
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/Release.gpg Unable to connect to extras.ubuntu.com:http:
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/Release.gpg Unable to connect to security.ubuntu.com:http: [IP: 91.189.91.15 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/Release.gpg Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.149 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-updates/Release.gpg Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.149 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-backports/Release.gpg Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.149 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.
pings to all servers work just fine I have disable ipv6 adresses. Nothing seems to work. Can anyone help me