Proxy servers enable connections to remote servers that are located behind a firewall.
You can use Software Update Notifier to set the preferences for your proxy server. After the proxy server is enabled, this server is used for all server communications.
HTTP proxy
In Software Update Notifier, click . To use this option to enable an HTTP proxy server, you must enter the values in the HTTP Proxy host and Proxy port fields. The Proxy port value must be a number from 0 - 65535.