Cannot connect from different subnet

hi,

im a newbie Linux/untangle user. my scenario:

Untangle server setup on the 192.168.16.0 subnet. External nic configure to router. from the untangle server I can ping internal (16 subnet) and external ip's. I can also surf from the untangle server. I have also turned off the firewall on the untangle server.

1. I need to use untangle as a proxy server from different subnets. do I need to install jus the web lite module? how can I add the subnets to untangle to allow it to use the server as a proxy server ?

will appreciate all the help. thanks