PPM, Proxies and Firewalls

Right click on "My Computer", click on "Properties" and select the "Advanced" tab.
Click the button marked "Environment Variables" and make the following changes in
the "System Variables" window:


With the "New" button, add the setting HTTP_proxy, with your proxy name as the
value (you must include "http://"), followed by a colon and the proxy port, if
applicable; e.g., "http://proxy:8080/" 
If you require a user name and/or password to access your proxy, use the "New" 
button to add the settings HTTP_proxy_user and HTTP_proxy_pass, with your user
 name and password as the respective values