root@server:~# sudo apt-get update
Hit http://ftp.debian.org squeeze Release.gpg
Ign http://ftp.debian.org/debian/ squeeze/contrib Translation-en
Ign http://ftp.debian.org/debian/ squeeze/main Translation-en
Ign http://ftp.debian.org/debian/ squeeze/non-free Translation-en
Ign http://ftp.debian.org squeeze/updates Release.gpg
Ign http://ftp.debian.org/debian-security/ squeeze/updates/contrib Translation-en
Ign http://ftp.debian.org/debian-security/ squeeze/updates/main Translation-en
Ign http://ftp.debian.org/debian-security/ squeeze/updates/non-free Translation-en
Hit http://ftp.debian.org squeeze Release
Ign http://ftp.debian.org squeeze/updates Release
Ign http://ftp.debian.org squeeze/updates/main amd64 Packages
Ign http://ftp.debian.org squeeze/updates/contrib amd64 Packages
Ign http://ftp.debian.org squeeze/updates/non-free amd64 Packages
Hit http://ftp.debian.org squeeze/main amd64 Packages
Hit http://ftp.debian.org squeeze/contrib amd64 Packages
Hit http://ftp.debian.org squeeze/non-free amd64 Packages
Ign http://ftp.debian.org squeeze/updates/main amd64 Packages
Ign http://ftp.debian.org squeeze/updates/contrib amd64 Packages
Ign http://ftp.debian.org squeeze/updates/non-free amd64 Packages
Err http://ftp.debian.org squeeze/updates/main amd64 Packages
  404  Not Found [IP: 130.89.148.12 80]
Err http://ftp.debian.org squeeze/updates/contrib amd64 Packages
  404  Not Found [IP: 130.89.148.12 80]
Err http://ftp.debian.org squeeze/updates/non-free amd64 Packages
  404  Not Found [IP: 130.89.148.12 80]
W: Failed to fetch http://ftp.debian.org/debian-security/dists/squeeze/updates/main/binary-amd64/Packages.gz  404  Not Found [IP: 130.89.148.12 80]

W: Failed to fetch http://ftp.debian.org/debian-security/dists/squeeze/updates/contrib/binary-amd64/Packages.gz  404  Not Found [IP: 130.89.148.12 80]

W: Failed to fetch http://ftp.debian.org/debian-security/dists/squeeze/updates/non-free/binary-amd64/Packages.gz  404  Not Found [IP: 130.89.148.12 80]

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