DMZ and Port forwarding

Posted on 2004-11-29
Last Modified: 2011-10-03

Question, in preperation for an Exchange migration, our current exchange 5.5(x.x.x.5) is setup on the DMZ network. The Sonicwall firewall, also our dhcp server, has the IP range of x.x.x.5 to x.x.x.25 as the DMZ zone. Now if I wanted to take x.x.x.5 and turn on port forwarding for SMTP how would that work? Since x.x.x.5 is in the DMZ, isnt this already exposed to the public internet?

Should I remove this range from the DMZ scope and then add x.x.x.5 as rule for port forwarding? Any advice would be appreciated. Thanks!
Question by:SANG501
    LVL 41

    Accepted Solution

    >> Since x.x.x.5 is in the DMZ, isnt this already exposed to the public internet?
    Yes, so if  you move it out of the DMZ, then forward the port to the internal ip of the server (not the external)
    LVL 9

    Expert Comment

    If it is in your DMZ then it should already be open to the public.  You should not have to do port forwarding unlesss you move it to your private network.
    LVL 41

    Expert Comment

    Glad to help!

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Highfive Gives IT Their Time Back

    Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

    Overview This article describes how to silently install Adobe Reader on multiple workstations, customize the installation options (accept EULA, remove desktop shortcut etc) using the Adobe Customization Wizard and install Adobe Reader font packs an…
    What’s a web proxy server? A proxy server is a server that goes between clients and web servers, used in corporate to enforce corporate browsing policy and ensure security. Proxy servers are commonly used in three modes. A)    Forward proxy …
    Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
    In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor ( If you're interested in additional methods for monitoring bandwidt…

    760 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    8 Experts available now in Live!

    Get 1:1 Help Now