= (Web) Proxy by SSH =

To get Web access to I-MATH intranet webserver it's possible to setup a SOCKS SSH proxy channel. This makes 

== Start SSH Proxy ==

 * Use SSH

   * Linux & Mac OS X: preinstalled.
   * Windows: https://www.howtogeek.com/336775/how-to-enable-and-use-windows-10s-built-in-ssh-commands/

 * On your '''local computer''' open a terminal and start the SSH Socks connection (provide your I-MATH password and leave the connection open all time):
{{{
ssh -C -D 1080 <I-MATH account>@ssh.math.uzh.ch
}}}

 * This terminal won't be used anymore, but it has to be open as long as the proxy is in use!

== Start the Browser ==

The proxy configuration can be done:

 * on the OS - not described here.
 * via commandline - described here for Google Chrome and Opera.
 * inside the browser via GUI - described here for firefox.

To use the I-MATH intenal DNS Server (necessary get access to hostnames that are only known inside of I-MATH), use the SOCKS5 protocol, '''incl. DNS forward'''.
 
For Google Chrome or Opera, open a second terminal and type the following command

|| Browser || Command ||
|| Google Chrome || Linux: `google-chrome --proxy-server="socks5://localhost:1080"`<<BR>>Mac OS X: `/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --proxy-server="socks5://localhost:1080"`||
|| Opera || Linux: `opera --proxy-server="socks5://localhost:1080"`<<BR>>Mac OS X: `/Applications/Opera.app/Contents/MacOS/Opera --proxy-server="socks5://localhost:1080"`||
|| Firefox || * There is no officially option '-proxy-server' for the commandline<<BR>>* Start firefox, open 'settings', navigate to 'network' > screenshot ||

{{attachment:ff-proxy.png}}