My company utilizes a Cisco PIX 506. The PIX only has 1 ethernet port which goes to our main switch. We currently have an Exchange server that is accessible via the Internet based on NAT and port forwarding. I have opened up ports for PC Anywhere and some other services etc. We are going to be setting up some web servers and I was wondering if this would be a good time to setup a DMZ or should I just leave things the way they are?