In contrast to virtual private networks proxies act an intermediary between your device and another network or the internet. Sometimes cooperations enforce to use proxies to access the internet.
Configuration
Usually proxies are configured and act on the application layer. Thus it can be fiddely to set them up uniformly for all network traffic coming out of a device.
Linux
On Linux most of the applications apply proxies they find in environment variables such as http_proxy or socks_proxy.
sudo
/etc/sudoers:
Defaults env_keep += "ftp_proxy http_proxy https_proxy no_proxy"
docker
/etc/docker/daemon.json:
{
"proxies": {
"http-proxy": "http://127.0.0.1:1080",
"https-proxy": "http://127.0.0.1:1080",
"no-proxy": "localhost,127.0.0.1,192.168.0.0/16,10.0.0.0/8,172.16.0.0/12,::1"
}
}
~/.docker/config.json:
{
"proxies": {
"default": {
"allProxy": "socks://172.17.0.1:1080",
"httpProxy": "http://172.17.0.1:1080",
"httpsProxy": "http://172.17.0.1:1080",
"noProxy": "localhost,127.0.0.1,192.168.0.0/16,10.0.0.0/8,172.16.0.0/12,::1"
}
}
}