The Proxy Preferences Page

Some networks use proxy servers to provide internet services to LAN clients. Clients behind the proxy may therefore, only connect to the Internet via the proxy service. If you are not sure whether your computer is required to use a proxy server to connect to the Internet or you do not know the proxy parameters, consult your network administrator.

To open the Proxy preferences page, go to Options > Preferences > Connection Settings > Proxy. The following options are available: