--- /dev/null
+# official debian repository (mirror selected via geo-ip):
+ deb http://cdn.debian.net/debian/ unstable main contrib non-free
+ deb-src http://cdn.debian.net/debian/ unstable main contrib non-free
+
+# official debian repository:
+# deb http://ftp.debian.org/debian/ unstable main contrib non-free
+# deb-src http://ftp.debian.org/debian/ unstable main contrib non-free
+
+# official debian DE repository:
+# deb http://ftp.de.debian.org/debian/ unstable main contrib non-free
+# deb-src http://ftp.de.debian.org/debian/ unstable main contrib non-free
+
+# official debian AT repository:
+# deb http://ftp.at.debian.org/debian/ unstable main contrib non-free
+# deb-src http://ftp.at.debian.org/debian/ unstable main contrib non-free