Previous 1 2 Next 21 Replies Latest reply: Jun 27, 2015 5:10 PM by trjeff
bpeacock22 Level 1 Level 1
I just spent hours figuring this out so I thought it would be helpful to someone. Maybe, maybe not. My goal was to get Back to My Mac turned on...but this should also be how you set up your wireless network if you have both an Airport Extreme and a Uverse Gateway.

As I was trying to setup BTMM, I got a "double NAT" error. To use BTMM, you have to use either Time Capsule or Airport Extreme, so that NAT has to be enabled. That meant I had to figure out how to turn off U-verse's. I looked through the settings but saw nothing about it. Several hours of research--and a useless support call to AT&T--I finally figured it out. Here's the configuration you need, in brief.

On the Airport Extreme, under Internet > Internet Connections, Connection Sharing must be set to "Share a public IP address". Then under the NAT button, Enable NAT Port Mapping Protocol must be checked.

Now, unless you doe rest of this configuration, you will get a double DHCP error. So, in the Uverse Gateway settings, you must do this:

1. Under Wireless, click the option to DISABLE wireless. Click Save.

2. Under Firewall, click the option with DMZ in the name. On this page, choose your Airport Extreme (whatever you named it). Then scroll down and choose the option that says "Allow All Applications (DMZPlus Mode)". Save that configuration. DO A HARD RESET ON THE AIRPORT EXTREME. Then that should enable a single NAT protocol and BTMM will be on its way. And your wireless network will be set up properly.

27" iMac, 3.6 GHz i5, 4 GB DDR3 RAM, 256 GB SSD, 1 TB HD, Mac OS X (10.6.4), iPhone 4, Photoshop CS3, iWork 08, Final Cut Studio 3
  • bpeacock22 Level 1 Level 1
    Sorry I just realized in re-reading my post that someone might take "hard reset" wrong. I meant power cycle the Airport Extreme.
  • pauldavsmith Level 1 Level 1
    I recently installed the Uverse Gateway but wanted to stick with my Airport Extreme. AT&T indicated this was not possible but I found this post, tried the settings and it works perfectly. I could not be happier! Thanks for the great post.
  • amanda-lynn Level 1 Level 1
    +1 Thanks, this was a great, informative post. Worked like a charm! After a good hour of searching, I kept seeing references to this setup, but was unable to find any clear instructions or explanation of what needed to be accomplished. Well done!
  • bobbywolfe Level 1 Level 1

    Not to be ignorant but I didn't see the option to:


    . Under Wireless, click the option to DISABLE wireless. Click Save.


    To be fair I'm using the newest firmware for Air Port utility and I'm configuring a Time Capsule. Any suggestion? Thanks!

  • Bob Timmons Level 10 Level 10

    Open Airport Utility - Click Manual Setup


    Click the Wireless tab below the row of icons


    To Disable wireless on the Time Capsule, you would select the following setting:


    Wireless Mode = Off


    Click Update to save your settings

  • bobbywolfe Level 1 Level 1

    I appreciate the response. I think I may have a more unique set up than most btw. Will the above method work on a set up with a Verizon Modem to a DLink wireless router to a Time Capsule? I understand that this is the preferred method for most people using a modem and a router, but was wondering if a 2 router system will still work.


    To answer a question you may be thinking about asking, my house is huge and my office/den is literally set approx. 175 feet around 2 major corners and hallways away from the entry point. The main entry point for Verizon cannot be relocated, so that is where the original router is set. I can't get a signal at all from the router at this end of the house, so I can't eliminate the interim router.


    Weird thing is Air Video set up tells me I have a double NAT, but I've successfully VPN'ed my way to my Macbook from the internet with a simple port route, which I didn't think possible with a double NAT. Would your method be smarter than setting up a port routing situation? It's getting cumbersome now having to open up Plex, Air Video, VPN and remote access.



  • Bob Timmons Level 10 Level 10
    Will the above method work on a set up with a Verizon Modem to a DLink wireless router to a Time Capsule?

    I know of no reason why it would not. Whenever there is another router ahead of the Time Capsule, the Time Capsule must be configured in Briddge Mode. My network has 4 routers. The "main" router is setup to handle DHCP and NAT and the other 3 routers are setup in Bridge Mode. No problems.


    Weird thing is Air Video set up tells me I have a double NAT

    Double NAT occurs when you have two routers on a network both set up to handle DHCP and NAT services. Your Verizon "modem" may be a gateway....a combination modem/router on the same chassis. If that's the case, then every other router on the network must be confgured as a "Bridge".


    If you have the "main" router on the network setup to handle DHCP and NAT, in theory, you can have multiple other routers on the network as long as they are all setup in Bridge Mode. In Bridge Mode, DHCP and NAT are turned off, so the other routers simply pass through the network information from the main router. It's by far the easiest way to configure multiple routers without having to go into special DMZ, port mapping, etc type of configurations.

  • sacoffee Level 1 Level 1

    bpeacock's solution worked for me ... except what I did is reset the APE to factory and reset it up with the settings he described.  You have to ignore allow update on WAN to avoid amber light.

  • Michele Hansell Level 1 Level 1

    Thank you! I have just done in 10 minutes what I was told couldn't be done by Uverse support.

  • mschare Level 1 Level 1

    I tried to do this but there is a new airport utility. I have a time capsule.  I could do all the 2wire stuff, but the buttons are now different on the Airport Utility.  How do I setup the time capsule side? I couldn't figure out how to share a public IP address.  I kept on getting a double nat error message.  The only way it would work is in bridge mode.  I'm supposed to have a 12 mps download, but I'm only getting 3.5. HELP!

  • mschare Level 1 Level 1

    I downloaded a new version of the Airport Utility it reverts back to v5.6. I was then able to follow the instructions.  EXCELLENT!!! My Apple network has never functioned so well.  I tried to fix this problem with AT&T THEY ARE USELESS!

    Thank you very much for posting. You should let AT&T know about this.

  • dougieINFJ Level 1 Level 1

    I followed this setup as I was having problems with BTMM, ScreenSharing and WiFi Syncing. These all seem to be working as expected. However my iOS devices are not able to "see" my uverse receivers to use the iPad/iPhone remote feature. Looking at the time capsule it looks like it has an IP address from AT&T.


    Any ideas?

  • willarr Level 1 Level 1

    @mcshare Thanks, I was using the newer Airport Utility and didn't see some of these settings (Internet > Internet Connections...)


    @bpeacock22 How is your Uverse Router set? When I try to set my Airport Extreme to use DMZplus, I get an error saying that it has a static ip and DMZplus requires devices to use DCHP. The Airport Extreme is set to receive an IP via DCHP, but the built-in 2Wire Router the Airport is connected to via ethernet is only allowing me to set it to Static.


    I do have a Sprint AirRave connected directly to the 2Wire. Could this be the problem? I suppose I could put it in line between the modem and the Airport.

  • bigdog51421 Level 1 Level 1

    Just got a new Airport Express...used the steps and we're all green now!  Thanks!!!

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