# official debian repository:
  deb     http://ftp.debian.org/debian/ wheezy main contrib non-free
  deb-src http://ftp.debian.org/debian/ wheezy main contrib non-free

# security updates:
  deb     http://security.debian.org/ wheezy/updates main contrib
  deb-src http://security.debian.org/ wheezy/updates main contrib

# backports:
  deb     http://ftp.debian.org/debian/ wheezy-backports main contrib non-free
  deb-src http://ftp.debian.org/debian/ wheezy-backports main contrib non-free