Is there a way for pre-setting proxy addresses for specific networks?

Question

I'm tired of commenting in and out different proxy acquire lines which located in /etc/apt/apt.conf.d/10proxy as I change networks. Is there a way for binding the settings for networks? Iphones have an option like that, but I wonder if I can do it with my computer without writing a script for doing that for me. I've made a little search and checked man proxy & man 10proxy but they don't exist and couldn't find anything useful.

Answer 1

I suggest pacproxy if you are familier with Ruby. After installation, you can use like as follows.

$ bundle exec pacproxy -P ~/proxy.pac -p 3128

$ export $PROXY=localhost:3128

Answer 2

Whenever a network interface goes up or down, scripts in /etc/network/*.d are executed.

So for example you could make /etc/apt/apt.conf.d/10proxy a symbolic link whose target gets changed by a script in /etc/network/if-up.d. These scripts get a few environment variables, in particular IFACE with the interface name; you can use ifconfig, route, ip, etc. to obtain information about the network that's being joined. The interfaces(5) man page documents this facility.