Proxy defines whether to use a proxy server rather then direct connection.
Using proxy is possible with HTTP, HTTPS and FTP protocols.
The default port value is 3128, which is similar to the port used by Squid proxy server.
If the Proxy value is empty, or no Proxy commands are defined, then direct connection is used.
Proxy can be set multiple times and affects on all following Server and Realm commands until the end of the configuration file, or until the next Proxy command.