Without the avahi daemon running to advertise the proxy, it only works when you explicitly opt-in. This makes it a poor replacement for installing squid-deb-proxy natively on a box. There are a couple ways to potentially resolve this:

• Supply a fig.yml configuration which also starts a separate avahi-daemon container, with the /etc/avahi/services path shared between the two.
• Start avahi-daemon from the start.sh script, with the -D flag which daemonizes it.
• User supervisord to manage the avahi-daemon and squid3 processes.

This would be a lot better than simply silencing them. See for example how the nginx container sets this up:

https://github.com/nginxinc/docker-nginx/blob/bfd44877c95987104864958c03e2db9d0793c21b/Dockerfile#L12

This squid image is a really great idea, but it's very annoying that the default docker network ( 172.17.x.x ) isn't picked up by the squid auto added of ip address ranges.
An out of the box install of squid-deb-proxy means I get permission denies whilst using it for apt-get install updates on another container on the same machine.
Any advice of the fastest way to update the allowed-network file would be greatly appreciated.

$ 1456143979.111 0 172.17.0.1 TCP_DENIED/403 3753 GET http://security.debian.org/pool/updates/main/c/curl/libcurl4-openssl-dev_7.38.0-4%2bdeb8u3_amd64.deb - HIER_NONE/- text/html 1456143979.111 RELEASE -1 FFFFFFFF 41A54AB1E1EAE46195AAD1472DA3C8B5 403 1456143979 0 -1 text/html 3374/3374 GET http://security.debian.org/pool/updates/main/c/curl/libcurl4-openssl-dev_7.38.0-4%2bdeb8u3_amd64.deb 1456143979.111 0 172.17.0.1 TCP_DENIED/403 3705 GET http://security.debian.org/pool/updates/main/c/curl/curl_7.38.0-4%2bdeb8u3_amd64.deb - HIER_NONE/- text/html 1456143979.111 RELEASE -1 FFFFFFFF 23BB42DE1358FF3EE967335F656A09AE 403 1456143979 0 -1 text/html 3326/3326 GET http://security.debian.org/pool/updates/main/c/curl/curl_7.38.0-4%2bdeb8u3_amd64.deb 1456143979.112 0 172.17.0.1 TCP_DENIED/403 3717 GET http://security.debian.org/pool/updates/main/c/curl/libcurl3_7.38.0-4%2bdeb8u3_amd64.deb - HIER_NONE/- text/html 1456143979.112 RELEASE -1 FFFFFFFF 5DBC5FCCE6FAD9A7BDCF598B14FFC3A9 403 1456143979 0 -1 text/html 3338/3338 GET http://security.debian.org/pool/updates/main/c/curl/libcurl3_7.38.0-4%2bdeb8u3_amd64.deb