IIS Blank Title 62270

We are planning on going up with sales connect some time in the next
2 weeks. Right now I have my IIS server inside our network behind the
firewall with Port Forwarding. The server that IIS is running on also
has CorVu, Altec Doclink, & VSI-Fax Server. I am wondering if it
would be to my benefit security wise to put my IIS/Webspeed messenger
on a server outside the firewall in the DMZ?