How do I setup a DMZ?

Posted on 2009-04-29
Last Modified: 2012-05-06
I have AT&T DSL with 5 IP's and a Netopia 3347 router.
Currently using one IP setup with NAT to the private addresses behind the firewall and port 80 forwarded to the web server.
I'd like to create a true DMZ with web servers outside the firewall using the currently unused 4 IP addresses.  Can anyone provide any guidance on how to accomplish that?
Question by:marknicks
    1 Comment
    LVL 57

    Accepted Solution

    That router does not seem to support multiple NAT maps.

    So I am not 100% sure about this.  It does support VLAN's.  So you could try and setup a VLAN that uses the public IP addresses.  Then, if possible, turn off NAT'ing for that VLAN.  

    I don't know if you can turn off NAT'ing for a single VLAN on that router.  And if you do turn of NAT'ing that means the router will no longer be providing any firewall functions for that specific VLAN.  The router only does firewall functions when it is doing NAT'ing.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Free camera licenses with purchase of My Cloud NAS

    Milestone Arcus software is compatible with thousands of industry-leading cameras for added flexibility. Upon installation on your My Cloud NAS, you will receive two (2) camera licenses already enabled in the software. And for a limited time, get additional camera licenses FREE.

    #Citrix #Citrix Netscaler #HTTP Compression #Load Balance
    Join Greg Farro and Ethan Banks from Packet Pushers ( and Greg Ross from Paessler ( for a discussion about smart network …
    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.
    This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor ( If you're looking for how to monitor bandwidth using netflow or packet s…

    779 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

    11 Experts available now in Live!

    Get 1:1 Help Now