Can't install packages? Updates not working?

Edit /etc/apt/sources.list.d/sources.list and replace cdn with http:

deb http://archive.turnkeylinux.org/debian wheezy main

deb http://http.debian.net/debian wheezy main
#deb http://cdn.debian.net/debian wheezy main
deb http://http.debian.net/debian wheezy contrib
#deb http://cdn.debian.net/debian wheezy contrib
# deb http://cdn.debian.net/debian wheezy non-free