Status: Double NAT

I have a comcast router connected to the airport extreme then on to airport express.
Comcast just changed their router to bridge only.   My airport extreme is flashing yellow w/ Double NAT status.  The airport express is fine.
Any suggestions on how to fix the Double NAT issue?
Thanks in advance

As LaPastenague has already noted, you have a modem/router, also known as a gateway device which is providing DHCP and NAT services.
Since the AirPort is also providing NAT services when it is setup as a router, you can easily see where the Double NAT is coming from.
So, one of the "techs" did not even know what type of device you had. That is gross incompetence.
The other two "techs" might have tried, but neither of them was successful setting up the SMC as a simple bridge mode modem......yet they told you they were successful. It just may not be possible to do this with the device that you have.
A simple modem......it will have only one Ethernet port on it......is what you need. It will be in bridge mode by default. When you connect the AirPort to the simple modem, your network will function correctly without errors.
Something like this, for example......http://www.zoomtel.com/products/5341J.html........which is an approved modem for use with Comcast.
Not sure where you want to go from here, but we'll try to help if you have further questions.

Similar Messages

  • How do I correct a Double NAT status?

    I have used time capsule 2TB for a while, made changes many times,never had a problem but today after I made changes it is giving me a blinking amber light from the time capsule unit and from the airport wireless utility status "Double NAT". How can I correct this status?
    Thank you in adavnce for the help.

    Hi Thortey,
    If you are having issues with a "Double NAT" notification, you may want to take a look at the following article; while it speaks to Double NAT specifically in the context of Back to My Mac, the information and resolution steps for a Double NAT configuration should be universal:
    Back to My Mac: "Double NAT" configurations may prevent Back to My Mac connections
    http://support.apple.com/kb/TS1208
    Cheers,
    - Brenden

  • Trying to setup Time Capsule, how do i fix status that says "double NAT", preventing wifi from working?

    In setting up Time Capsule, it won't connect to wifi.  In the status pop up of the Time Capsule under the Airport Utility it says "Double NAT".  I dont' know how to fix that.
    Thanks.

    This is one goofy modem that acts as if it is a router, so that is why the Double NAT issue is appearing.
    There are two ways to tackle this:
    1)  If everything seems to be working OK, you have the option to click to "Ignore" the Double NAT error in AirPort Utility and the Status light will turn green.
    Double NAT is usually not too serious of an error on a simple home network, but it will be a deal killer if you have an online gaming console and want to play games interactively on the Internet.
    Your connection will slow slightly because of the multiple NAT firewall layers the signal must pass through, but you will likely not notice this in normal browsing, email, etc.
    2)  Reconfigure the modem to act in "bridge mode" only and then change the method that the Time Capsule uses to connecf from Ethernet to PPPoE service.  There will be no NAT errors this way and this is what AT&T recommends....see link below.....but we are talking about some major surgery here.
    http://www.att.com/esupport/article.jsp?sid=KB401764&cv=801,902&title=Connecting +a+non-AT%26T+provided+router+to+your+AT%26T+Internet+connection#fbid=kfca5LRlzv D

  • Double NAT error status after updating to firmware 7.1

    This may be a bug. My Airport Extreme was working perfectly, but after updating to firmware 7.1, with no other changes to configuration, it is now reporting a Double NAT error. Both wired and wireless clients still have access to the WAN and each other, so everything still works. I know I can ignore the error, but I wonder if anyone else has seen this issue?
    I have a possibly unusual setup -
    My DSL modem creates an address of 192.168.1.47 and hands that to the APE as its WAN address. I've configured the APE to hand out addresses to its client machines on the LAN in the 192.168.2.x range and it does that correctly. So there is no actual conflict - the WAN address is 192.168.1.47 and the client addresses are all in the 192.168.2.x range. Could the new software be assuming that the 192.168.1.x range is the NAT range without verifying the actual range is really 192.168.2.x? Seems unlikely, but it appears to be the case.
    Any insights on this appreciated....
    mac mini   Mac OS X (10.4.9)   my Airport Extreme is less than a month old

    When iTunes attempts to sync photos from iPhoto, it shows the amount of the iPod drive taken up with photos, BUT NO usage on the drive graph itself.
    When Sync Photos from iPhoto is deselected and another sync attempted, iTunes asks if photos should be removed from iPod, despite the previous sync being unsuccessful. When I choose to remove the photos, the amount shown taken up by photos disappears.
    Does anyone know what the error message quoted in my question above means?
    iBook G4 1Ghz/iMac G5 iSight   Mac OS X (10.4.3)   iPod Photo 40GB

  • Time Capsule with Double NAT status - Question.

    Hi all.. would appreciate some advice.
    I have a Time capsule set to DHCP/NAT.
    I have a second Airport extreme connected to TC via eithernet (about 100 yards away) set to Bridge to further my signal on a big property.
    I have several Aiport Expresses for Airplay only.
    I recently called Apple and they told me to set my TC to DHCP/NAT and chose ignore.
    I had problems with my computers connecting to the internet (they connected to my network, but not internet.  Or occasionally I would get errors on my MBP that said could not connect this IP address is used by another device).  It was sporatic.  Apple told me this was likely because I have 20-30 wifi devices in my house and my ISP is not providing enough IP addresses.  They told me that DHCP/NAT makes my TC 'be in charge' of these IP addresses.
    I am using Frontier service.  Modem from Frontier is Netgear B90 - 755044 - 15.
    When I set up this modem, I turned the wifi portion off.  And currently the wireless light on the modem doesn't ever blink, so I believe it is off.
    So why am I getting the Double NAT error since my Modem appears to have the wifi portion turned off?
    Thank you very much!

    Thanks again Bob!
    I called Frontier... they refused to show me how to put my modem/router in Bridge mode.  Hypothentically, if I did that, would that solve this problem?  Sounds like it would.  They said they won't show me how to do it because they use PPPoE or something and if I put into bridge mode I won't get internet access.  Is that true?  They only use bridge mode for businesse they said.
    I never wanted a modem/router.... I wish I only had a modem! .  Maybe I will call them back and ask only for a modem.  Good idea.
    Attaching a screen shots below.
    If I go into My connection at the top, hit Edit.... no where in there is a bridge option.
    If I go to that green Enabled one under VC's... where it says PPPoE, there is a selection to choose Bridge.
    See below.
    But I'm too chicken and I don't know if that is the answer or not.
    Thougths?
    Thanks again Bob!

  • Sprint Airave Causes "double NAT"

    I connected a Sprint Airave between my Cox Cable modem and my Apple Airport Express. Now I have a flashing amber light and a "double NAT" status. Is there a downside to having a "double NAT" status. If so, how do I fix it? Bridge mode destabilized internet. Other idea?

    The Sprint Airave is actually working as a NAT router.
    If you read some of the info about these boxes.. eg http://www.pocketables.com/2013/04/sprint-airave-2-5-four-and-a-half-months-in.h tml
    They can be pretty terrible. And the suggested layout is probably wrong. You would be better having the
    cablemodem--Express--Sprint
    So that the Express can be the main router for the network.
    If you are stuck with double NAT.. it is very much non-ideal.. you might find it works for most things, then a web page won't load properly or you cannot connect to game.. most interactive stuff on the internet will not work via a double NAT. You can browse and do email because they are not interactive.

  • Will 'Double NAT' cause any problems for me?

    Hi there
    I have just received a Netgear VMDG280 Cable/ DSL modem/wireless router from Virgin Broadband in the UK and I plugged it into my Airport Extreme 802.11n base station. The internet works fine but the amber light remains flashing, warning me of a Double Nat error.
    I can easily select for my Airport to 'ignore' this Double NAT error message, but am worried that by ignoring this warning, I might compromise something important in my whole broadband set up. Could it also reduce security etc?
    Essentially, Im not doing anything fancy with my wireless network, besides running a Macbook Pro, Iphone, Ipad and friend's laptops etc.
    With Double NAT existing on my network, will this affect the service I will receive in any way? Or can I just put it out of my mind?
    Many thanks
    Dan

    +If I operate Airport Extreme in Bridge mode, will that mean that the technical quality and security of the Airport Extreme base will be bypassed in favour of the Netgear?+
    No
    +if the Netgear is classed as the lesser device of the two, shouldnt the Airport Extreme handle the more important tasks rather than being a passive 'bridge'+
    The Netgear is already configured as the "main" router on your network. It is what we call a "gateway", a combination modem and router on the same chassis. The AirPort Extreme does not include a modem, so if you wanted to make it the "main" router on your network, you would need to purchase a separate stand alone modem and then set up the Netgear as a "bridge". That gets really complicated.
    If you are seeing no adverse effects of the Double NAT, you can choose to "ignore" the message and the light will turn green. If you want to do this, open AirPort Utility, click Manual Setup, and then click on the word "Status" on the summary page. Click "ignore" regarding the Double NAT.
    Networking rules specify that you should try to avoid the Double NAT situation if possible. On a simple home network this is not usually a serious error, but it can slowdown internet browsing. If you plan to add a gaming console and want to play online games with other people, then the Double NAT will probably prevent you from doing so.
    My suggestion to place the AirPort Extreme in bridge mode was just that...a suggestion. If you are happy with the performance of your network now and simply want to get the light to turn green, you can choose to "ignore" the message.

  • HT3728 My AirPort Base station connects me to the Internet but I get an error message saying "Double NAT"  can u help me?

    My Internet connection is fine but everytime I turn on the computer I get an error message about my AirPort Extreme that says. "Double NAT"  can I fix this or should I not even worry. 
    Thanks

    Open Macintosh HD > Applications > Utilities > AirPort Utility
    Click on the AirPort Extreme
    Click the amber dot next to Status
    Click the option to ignore Double NAT
    Allow the settings to update and the AirPort Extreme will restart with a green light in 25-30 seconds.

  • Since cahnging FIOS Internet provider, which required a router to go in front of "AirPort" I have a blinking yellow on the AirPort and suggested editing in AirPort utility to cahnge from Double NAT to "Bridge Mode" my knowledge base is not clear as t

    How do I clean up my new FIOS connection? I just cahnged ISP Fios and they reqquired a router of thier own in front of my AirPort Extreme. Since then I have blinking yellow light on the AirPort and AirPort utility keeps promting for an edit. Suggests canging from NAT to "Bridge mode". Obviuosly U have some internet or this post would not go anywhere, my knowledge base is not enought to feel comfortable with changing the settings. Correctly editing can be tricky, so how do I make necessary changes?

    How do I clean up my new FIOS connection?
    The FIOS router needs to be in Bridge Mode to prevent the Double NAT error from occurring when two routers are both fighting with each other for control of the network.
    Unfortunately, the likely problem from the FIOS side is that FIOS support will either tell you that their router cannot be configured to operate in Bridge Mode, or if it can, they will not tell you how to do it.
    But, it could not hurt to check with FIOS to see if anything might have changed recently in this regard, so your first call would be to FIOS support.
    If you cannot change the FIOS router to Bridge Mode, the alternate plan would be to change the AirPort Extreme to Bridge Mode. If you are using the Guest Network feature on the AirPort Extreme at this time, that feature will not work correctly when the AirPort is set up in Bridge Mode.

  • Why do I lose internet connection when I put airport extreme into bridge mode to correct Double NAT issue

    I reset my airport extreme router the other day because I was too lazy to reset the password on my private network.
    I have been reading the advice found on apple support communities and wide web, but the solutions do not solve any problems and often create new ones.
    I'm regretting because everything was working just fine.
    But I remember having this double nat error when I first set it up a few months back, but now I cannot resolve it.
    I would live with the yellow light, but it seems that this double nat error is preventing my playstation 3 from connecting to the airport extreme.
    When I put the aiport extreme into bridge mode, I loose all my wireless networks, even when I reboot the airport extreme and the modem.
    I try rebooting the modem, then the airport. and vice versa. No internet.
    I switch back to NAT/DCHP and the internet works fine on apple devices, but not the playstation 3, and I have the 1 Double NAT error.
    I have a plain stock Motorolla modem and I can dial in and see settings (although nothing about NAT). I didn't see where to see them.
    I tried setting the DHCP only but it said it didn't like the settings. is there a stock range i could be using?

    I have a plain stock Motorolla modem and I can dial in and see settings (although nothing about NAT). I didn't see where to see them.
    Exact model .. motorola make adsl, cable and probably wireless modems.. with some modems and some modem router.. we need exact info. What kind of broadband do you have?
    I would note.. some of the motorola cable modems seem to have issues with the apple routers. If you are about due to change modems.. now is a good time.. not another motorola.
    If the modem is a straight cable modem, the AE must be in router mode.. but you need to power down the cable modem. maybe for 20min so the new router can pick up the IP address.
    You cannot use DHCP alone.. the ISP do not give you a block of IP addresses.
    You cannot use bridge with a pure modem.. you will find it works.. but only to one device.
    The only reason you get double NAT is the failure to pick up the public IP.
    Give the info required..
    If you have trouble, I need the actual IP of the modem. the actual IP of the AE WAN port when plugged in. Screenshots are good.

  • I live in an apartment with supplied internet.  I have wireless network with no password.  I have a wall outlet that I can plug into.  When I plug in my TC I get a double NAT error.  I try bridge mode, but I can't get the internet to work.

    Can I get an explanation of what bridge mode is?
    Can I get suggestions on what I should do to use the TC as a wireless device to spread the same wireless device my apartment is broadcasting? 
    Can I get a suggestion on how to use the TC as a different wireless device with it's own password without access to the cable modem.  I only have access to a wall port. 
    I own many apple devices, iMac mid-2011, Macbook Air 2013, 2 ipads, and 2 iphones for the family, and Apple TV. 
    I want all my devices to be on a password related internet but the double nat on my TC makes weird things happen and slow.  I try bridge mode but the internet doesn't work. 
    I hope I have described this situation clearly enough. 
    Thanks

    I want all my devices to be on a password related internet but the double nat on my TC makes weird things happen and slow.  I try bridge mode but the internet doesn't work.
    You building supplied internet is a cheap service that is without proper routable addresses..
    Therefore to use more than one IP you MUST have double NAT.. sorry there is no choice..
    Slow that is because you are sharing internet with every other person in the building.. get your own broadband service.
    Bridge will not work.. it cannot work because the building only has private IP addressing. And they only give you a single address.
    You can put a password on the wireless.. go to the airport utility and put in a password.
    Other than that I don't understand what password you expect.
    Can I get an explanation of what bridge mode is?
    No NAT.. means the TC becomes a dumb Wireless AP and switch.. works fine with a cable modem router.. or any broadband router but useless with your building system.
    Can I get suggestions on what I should do to use the TC as a wireless device to spread the same wireless device my apartment is broadcasting?
    Double NAT, and set your own wireless names. There is no alternative.. sorry.

  • No DNS and Double NAT

    Hello, I've recently encountered a very frustrating bug in my system that I could use some help troubleshooting.  I've read several similar posts, some are resolved while others are not, however none of the resolutions have worked for my situation.  Here it goes:
    I have an old macbook pro, a new macbook air, a white macbook and 2 iPhone 4s's all connected to the internet via WiFi through an AirPort Extreme.  The AE is connected to a cable modem which has internet service through Cablevision in NY.  There is also an AT&T Microcell hooked up to the AE to boost my cell signal.   All of this equipment has been working flawlessly together for a long time.  Until recently.  It could have started after an update, there have been several lately on all of the equipment including the firmware in the AE.  Anyway, I'll be connected without any issues - all lights green and happy - when suddenly, the internet will drop off and the AirPort Utility will pop up and warn me that:
    1) On the "internet" icon, it will say "disconnected"  
    2) On the AE icon, it says "No DNS server and Double NAT"
    After a few minutes and nothing done on my part, the lights turn green, the internet reconnects and all is well again. 
    This happens frequently and is really beaching a nuisance.  Due to the frequency of the disconnection, I can no longer download a large file, update, or anything.  Streaming video is impossible.
    So far, I have tried bridge mode and cycled the power in the order recommended to no avail.  When I do that, the AE turns green, but the internet says "not connected".  I have also read that there might be too many IP addresses which is not sitting well with my ISP, so I disconnected everything including unplugging the Microcell.  Lastly, there are no other wireless phones or devises in the house.  All to no avail.
    I should also mention that this began occurring on my Time Capsule, which I replaced with the AE in an attempt to fix this issue. 
    Any help would be greatly appreciated.
    Joe

    Sounds very similar to what I've been trouble shooting for 2 months now, only I have DSL from AT&T and I don't see the Double NAT warning.  My last post on the problem is here. 
    My only emergency solution for getting by day to day on the internet is to unplug the AE and connect one Mac directly to the DSL modem.  There's no shared connection or WiFi.  I looked at hosting WiFi from the Mac, but the only security available with that is WEP which isn't considered secure.  Even with this set up, I think (seat of the pants) that there are quality of service problems. 
    I've replaced the Airport Extreme with 2 different new units and the DSL modem with a new unit to no avail.  The Genius Bar and Apple phone support couldn't solve this, nor have 2 calls to AT&T support and one visit from an AT&T repairman.
    I would like to know how to better test or quantify the poor quality of connection that seems to be the problem.

  • Airport Internet Sharing and Double Nat Issue on the road

    The Airport express is a very handy little piece of hardware that is particularly easy to pack in a luggage and carry along for those of us that are spending lots of time out of the office and home.
    So here is the scenario when I travel and check in into an overseas hotel: I got two iphones, one local network, one my home network, and a Mac Book Pro, and soon, [when it finally ships], an iPad.
    That makes it at least 3 MAC addresses in one room, and if i have any visiting colleagues to pack up a presentation, I will have more.
    Usually hotels in Asia are well equipped with ethernet points in every room. The problem comes when I want to allow all my gears to connect to the internet.
    I can use the Mac Book to share its ethernet connection while tethered to the plug, which not only turns it into an unlikely desktop, but also do not champion stability when it goes in stand by or sleeps and at times it even mixes up which is the access point to the net. Therefore this does not seem to be the best solution.
    I can put the AE in bridge mode and plug it straight to the ethernet. But most hotels internet access are designed to charge per MAC address, so every time the router assigns via DHCP an IP to one of my gears it requires to accept new charges for that gear, even if they are all in the same room. This definitely does not seem right either.
    Now if I configure the AE to share a public IP address and force it to ignore the double NAT warning, the AE light turns green but the internet sharing does not seem to work at all.
    My two questions are:
    1) Why can't the AE be configured like the Mac Book to have a simple "Internet Sharing" protocol that will be always live and not going to sleep or stand by like the laptop [As the AE is design to be always online as a wireless connection].
    2) is there any way to make that "Share a public IP - *** double NAT" work?
    Any feedback is welcome.
    Thanks. M

    Hi Bob,
    thanks for your reply. Yes the only way to work it out on a typical hotel set up is to adopt the bridge mode and sometime the do waive your extra logs in. But I am not always so lucky and I often need to come up with less optimal solution.
    This is a bit disappointing when you a have a AE in your luggage and you can't use it properly.
    Yet my Mac can work the problem out effortlessly by just "Sharing a internet connection" with the only major limitation of being physically connected to the Ethernet cable.
    Why can't the Airport Express do the same thing? Basically the AE could share the internet connection like the Mac Book, i guess introducing a secondary layer of NAT after the Hotel modem/router NAT setup [which is what the MAC Book is doing].
    If AE can't do that at all then I guess soon we will just end up shelving it.
    I wonder if this is an actual hardware limitation, MAC Book can wire TCP/IP flow to different sources on a double nat and AE can't, or this is just a software limitation and Apple could fix it with a firmware upgrade.
    Any thoughts on this?

  • Time Capsule - No DNS servers and Double NAT

    I'm connecting an MBP running 10.5.6 to a Time Capsule which accesses Virgin Media broadband using a cable modem.
    It has been working fine for 6 months, but I made some changes this morning to get my wireless camera onto the network, which broke the connection, and don't seem to be able to undo them.
    The TC now flashes amber, and going into Airport Utility I get the following errors:
    - No DNS Servers
    - Double NAT
    I've typed the DNS servers' IP addresses for my ISP into Airport Utility but it doesn't seem to recognise them. It also complains about a double NAT problem but I don't have another router assigning IP addresses.
    I've also tried a hard reset on the TC, switched it and the modem off, waited 30 mins and then switched back on again - no luck.
    Screenshots of all the settings on my TC from Airport Utility are here:
    http://web.me.com/julianlove/Site/TimeCapsule.html
    I'm not very knowledgeable about networking so any assistance appreciated.

    Double NAT is an indication that you have two devices on the network both trying to perform routing duties. You only want one device doing this on a network. Solve the NAT issue and the DNS issue will go away as well.
    What is the make and model number of the device that you call your "modem"?

  • How do I set up my Airport Express to my Viasat modem, which requires a DHCP connection, without getting a double NAT connection error?

    I have an Airport Express connected to a Viasat 4100 satellite modem. This requires a DHCP connection and is connected to my Airport Express by Ethernet. I then have three computers (two running Mavericks and one running Lion) and two IPhone 5s and an Apple Tv on the network. If the Airport Express is set to DHCP and NAT then the network works and I have internet, but the amber light flashes and I have a double NAT error. If I use it in Bridge mode the airport express goes green but I have no internet. How can I set it up so it works properly? If anyone knows could they please give all the settings I shoud use on the Airport Express as I may have left incorrect setting on it whilst trying to fix the problem. I have checked and it has been confirmed that I cannot change any settings on the satellite modem.

    Go into AirPort Utility, click on the AirPort Express, and click on the "Double-NAT" error. Click Ignore. There's nothing that can be done about the Double-Nat unless you ignore it (no harm) or contact your ISP and get them to change your Modem/Router into Bridge Mode, and even then can't guarantee that you won't get that error.
    Again, best thing to do: Ignore the Double-Nat Error.

Maybe you are looking for