Firewall server help

Hey guys , I recently installed Untangled as a Transparent Bridge(a linux Debian based server) on an old machine(AMD dual core , 4GM RAM 300 GB HDD IDE)  but I can't get my laptop to connect to the internet that is supposed to get out of the server. Here is the map: DSL modem => Server (onboard network card) => Additional network pci card => laptop (or another switch ). The ISP modem is set to and the server to . I've been working on this for 3 days now but I can't get it to work. I had the same problem with pfSence in the past and gave  up. Any help is appriciated.


Thanks Mark :)