• WPAD : https://en.wikipedia.org/wiki/Web_Proxy_Auto-Discovery_Protocol
• http://www.netresec.com/?page=Blog&month=2012-07&post=WPAD-Man-in-the-Middle

$ export http_proxy=http://your.proxy.server:port
$ curl http://www.example.com

or

$ curl http://www.example.com --proxy http://your.proxy.server:port

$ curl http://wpad/wpad.dat > proxy  

• Socks Proxy : The most simple way to do set a Socks Proxy is via a SSH tunnel : ssh -D 8080 yourserver.com
• HTTP Proxy : https://tinyproxy.github.io/