/hudson-war/src/main/webapp/help/update-center/proxy-server.html

 1<div>
 2  If your Hudson server sits behind a firewall and does not have the direct access to the internet,
 3  and if your server JVM is not configured appropriately
 4  (<a  href="http://java.sun.com/j2se/1.5.0/docs/guide/net/properties.html">See JDK networking properties for more details</a>)
 5  to enable internet connection, you can specify the HTTP proxy server name in this field to allow Hudson
 6  to install plugins on behalf of you. Note that Hudson uses HTTPS to communicate with the update center to download plugins.
 7
 8  <p>
 9  The value you submit here will be set as <tt>http.proxyHost</tt> system property. Leaving this field empty
10  causes this property to be unset, which means Hudson will try to connect to the host directly.
11
12  <p>
13  If you are unsure about the value, check the browser proxy configuration.
14</div>