Supported Proxy Parameters

The following proxy parameters are supported:

http.proxyHost 
http.proxyPort 
http.proxyUser 
http.proxyPassword 

Consider the following:

If not included, the http.proxyPort parameter defaults to 80.
The http.proxyUser and http.proxyPassword parameters are optional. They are required only if the proxy requires authentication.
Best practice is to use an obfuscated password instead of a plain-text value for http.proxyPassword. See Obfuscating the Proxy Password for encryption details.