Overview

For Debian users, apt-cacher-ng is available at :9999.
For convinience, /debian and /debian-backports are transparently proxied via apt-cacher-ng to Debian archives.
Debian has discontinued debian-volatile but an archived copy is available at archive.debian.org debian-volatile="". For convinience /debian-volatile is proxied via acng to this archived copy: archive.debian.org

• Use /debian (and variants) as your repository. Ex:

  deb http://repo.iitd.ac.in/debian <release> main contrib non-free

• Add the following line to apt configuration (Usually /etc/apt/apt.conf)

  Acquire::http { Proxy "http://repo.iitd.ac.in:9999"; };

• Apply the proxy selectively on every run. Eg:

  apt-get -o 'Acquire::http::Proxy="http://repo.iitd.ac.in:9999"' install love

• To selectively use it for some servers only, prepend http://repo.iitd.ac.in:9999/ to entries in apt sources. Eg:

  deb http://repo.iitd.ac.in:9999/ftp.debian.org/debian <release> main