# official debian repository (mirror selected via geo-ip):
- deb http://cdn.debian.net/debian/ squeeze main contrib non-free
-# deb-src http://cdn.debian.net/debian/ squeeze main contrib non-free
+ deb http://http.debian.net/debian/ squeeze main contrib non-free
+ deb-src http://http.debian.net/debian/ squeeze main contrib non-free
+
+# security updates:
+ deb http://security.debian.org/ squeeze/updates main contrib
+ deb-src http://security.debian.org/ squeeze/updates main contrib
+
+# backports:
+ deb http://backports.debian.org/debian-backports squeeze-backports main
+ deb-src http://backports.debian.org/debian-backports squeeze-backports main
# official debian repository:
# deb http://ftp.debian.org/debian/ squeeze main contrib non-free