Sometimes a page is returned by a URL that contains an embedded applet that needs to be fetched from a remote machine. However Java security does not allow an applet to communicate with a host that it is not downloaded from. To allow the applet to communicate with the Gateway through the local network port, you need to check the Download Applet field on the Access Manager administration console and specify the following syntax:
local-port:server-host:server-port
where
local-port is the local port where Netlet listens for traffic originating from the applet
server-host is where the applet is to be downloaded from
server-port is the port used to download the applet