I have DSL and I've been using my Server2003 system as the router. So one of its NICs connected to the DSL modem and the other went to a hub where I distributed Internet access to my other systems. Each system, including the server2003 system, connected to the Internet this way runs ZoneAlarm.
Today, I've connected a Linksys WRT45G v2.2 Broadband Router to my DSL modem and my other systems now plug into the router. The hub has gone away and my server2003 system is just another system in this topology.
On the router, I enabled the firewall and then went to http://www.grc.com/intro.htm
and ran their ShieldsUp tool to see how well I was stealthed. I was 100% invisible. Then I opened up port 25 and 110 on my server2003 system so its SMTP and POP3 services would be available externally (I run a mail server here on the server2003 system).
My question is this:
Is there any point in running ZoneAlarm's firewall now that all my systems are behind the router?