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.

Similar Messages

Could DirectTv server be causing my Double Nat Issues?

     Could DirectTv server be causing my Double Nat Issues? I am using an older Motorola Modem, then my Airport Extreme, then my airport express in bridge mode. The DirectTv server seems to be plugged in before the Airportr Express so I am pretty sure it is no getting any info from the Airport Extreme but I am not sure.
     The modem is model Motorola SurfBoard 5101U. I do not beleive it has router capabilities.
     The problem seems to only come up when I am using my Mac Book Pro (Mavericks). Usually only when trying to download large files. It does not effect my ipads or iphones. Very strange.
    I've been racking my brain on this for a year.
Thanks,
Stephen

So, I run into some similar problems. I used to have the HD-DVR pre-Genie, which is when I started seeing some of the problems that my AirPort Utility was reporting. I hardwire every connection where possible. I currently run out of my AirPort TC into a switch. From the switch I go out to the rest of the house including an Apple TV and the new Genie. Along with multiple other wall ports, etc.
It seems to me that whenever I have my Genie hardwired in - for extended period of times my network will "crash" and I will receive an error of Double NAT. Once I unplug the DirecTV from the network, everything goes back to working fine. This ocurred on the old HD-DVR as well as the Genie.
I would welcome any ideas or suggestions.
I am running a Motorola SURFboard S86141, New AirPort Extreme TC, and a Netgear 8-Port Switch.
Thank you in advance for your help!!
Billy Trimble

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.

IChat Screen Sharing causes Time Capsule to have "Double NAT"

I have a weird situation, wondering if all you super-network geniuses could offer an opinion...
My current setup:
-DSL Modem hooked up to a Time Capsule.
-Time Capsule in Ethernet Mode & "Share Public IP Address: NAT & DHCP Enabled."
-Time Capsule has a wireless 5Gz "N-Only" network.
-MacBook Pro, PC and an Airport Express connected to N Network wirelessly.
-Airport Express "Extends network" via ethernet cable to Slingbox & TiVo (via switch.)
-Airport Extreme hard-wired to Time Capsule.
-Airport Extreme in Bridge Mode.
-Airport Extreme has a wireless "G" network & USB Printer.
-Airport Extreme network for "iPhones & G computer."
-Only Port Mapping is for slingbox, ports 5001,5001.
O.k. Everything works PERFECTLY! Except when I start a "Screen Sharing" session in iChat AV.
When I click "Ask to share xxx's screen" It says "Waiting on xxx" and then Airport Utility pops up, saying that the Time Capsule has an error - "Double NAT" and I'm off the internet. All I have to do is select "Restart Time Capsule" and after a reboot, I'm back in business, and all is well again. I can screen share, chat, etc. However, if I try and start "Screen Sharing" again, same thing - Double NAT.
Do I need to enable a Port Mapping for iChat?
Any suggestions or help would be greatly appreciated. I thought I finally had the network thing down, but this one little thing keeps making me reset my router. (Doesn't seem like the Apple way.)
Thanks.

I have the Time Capsule set up as the DHCP server, distributing a shared IP address.
The Express is set up to "Join and existing network."
I only have 1 Extreme and it is set to "Bridge Mode."
The Time Capsule is the router hooked directly to the DSL modem. It is in "Ethernet" mode, and I'm not quite sure how to check the little DSL modem's settings.
It's so strange, that only this one little request, "Ask to share xxx's screen" does this error occur.
Looking at more settings on the Time Capsule, under NAT settings, I do NOT have the "Enable default host at:" option checked, and the "Enable NAT Port Mapping Protocol" IS checked. Under Port Mappings, 5001,5001 is the only item for Slingbox.

Conflicting DHCP & Double NAT on Network

I have an older TC providing network service both via ethernet and wireless in my house. I have a 1st Generation Airport Express connected wirelessly to extend the network. I have a 2nd Gen Airport express connected via ethernet to extend the network. This ethernet connection is coming via a Netgear 10/100 Switch. Both Airport express devices are set in bridge mode. The TC is set in DCHP & NAT. Per a previous discussion with an applecare representative, I was instructed to ignore the Double NAT message, which worked fine. However, since I've been able to connect the 2nd Gen Airport express via ethernet, it seems to set up fine, but at some point gets kicked off the network. Also, upon setting up the express via ethernet, i get the conflicting DCHP message. In following the previous applecare suggestion to ignore the Double NAT, i went ahead and ignored the conflicting DCHP message as well. Should I simply set the TC to bridge mode? I seem to remember the applecare representative saying that wasn't a good idea. I have the TC hooked to receive the broadband signal via an AT&T modem and I've set the modem to not broadcast any wireless signal.
To conclude, as currently set up, all systems are working fine, with the exception of the Double NAT and Conflicting DCHP warnings on the TC. However, if past history is suggestion of upcoming experience, the express linked via ethernet will eventually get kicked off the network.
All these settings have been directed via the Airport Utility 6.3.2
Many thanks if anyone has suggestions.
~ds

Per a previous discussion with an applecare representative, I was instructed to ignore the Double NAT message, which worked fine.
Wow. Maybe I am not understanding what you are saying.
A Double NAT message would indicate a basic configuration error on the network. Trying to fix an error by ignoring it will not make the error go away.
Things might work OK for a limited time, but eventually the error is going to cause issues on the network.
However, since I've been able to connect the 2nd Gen Airport express via ethernet, it seems to set up fine, but at some point gets kicked off the network.
As I said.....Things might work OK for a limited time, but eventually the error is going to cause issues on the network.
Also, upon setting up the express via ethernet, i get the conflicting DCHP message. In following the previous applecare suggestion to ignore the Double NAT, i went ahead and ignored the conflicting DCHP message as well.
Ignoring two errors is going to cause issues as well.
Should I simply set the TC to bridge mode?
Yes, as well as all of the other AirPorts on the network......assuming that you have an ATT modem/router. What is the make and model number of your ATT device that provides your Internet connection?
On the other hand, if you have a simple ATT modem only, it is the modem that should be configured in Bridge Mode.
I suggest that you explore a bit different strategy for configuring your network......the correct method that follows basic networking rules.

Creating Two Networks with Different Securities and Double NAT Error

I have a Time Capsule which is connected to my cable modem and an AirPort Extreme connected to my Time Capsule via the WAN port. I configured the AEBS to create a wireless network using WEP (I have a few devices that don't support WPA) so I can use two different wireless securities. The AEBS flashes the amber light and once I connect to its network, the AirPort Utility states that it has a "Double NAT" issue. I used my iPhone 5 to connect to the AEBS network and I can access the Internet just fine.
Is this issue one that can be resolved? If so, how? Or do I ignore the issue? If I ignore, what are the implications?
Thanks!

You need to configure the AEBS in Bridge Mode to eliminate the Double NAT error, which is slowing down your connection...and may likely cause other issues depending on how the network is configured.
If you do not know how to do this, we need to know what operating system you are using on the computer that is being used to configure and setup the AEBS.

My Time Capsule is giving me a warning that double NAT situation is occurring and recommends that I set it to bridge mode What is all this about please can it be explained in layman's terms and not martian thank you.

My Time Capsule is giving me a warning that double NAT situation is occurring and recommends that I set it to bridge mode What is all this about please can it be explained in layman's terms and not martian thank you.

You have two devices....the Netgear and Time Capsule both configured to act as routers on the network. You only want one device providing this service.
I suggest that you configure the Time Capsule in Bridge Mode as suggested to eliminate the Double NAT error. Unfortunately, the Guest Network cannot be enabled in this setting.
No other adjustments are needed and everything else will operate normally...and the Time Capsule will still be providing your wireless network signal.
Once the Time Capsule is configured in Bridge Mode, it would be an excellent idea to perform a complete power cycle on the network to allow things to reset properly.
Just power off all devices on the network in any order that you want
Wait a minute
Start the Netgear device first, and let it run a minute by itself
Start the Time Capsule next the same way
Continue starting devices one at a time the same way until everything is powered backup
The other option you have is to "ignore" the error and the light will turn green. The Double NAT error may...or may not cause some issues for you down the line. The next time that you update the Mac operating system, or update the firmware in the Time Capsule, it may likely change the Time Capsule to Bridge Mode automatically.
If your Guest Network "disappears", you will know why this happened, and you will have to manually configure the Time Capsule again in Router Mode to provide DHCP and NAT services.
Double NAT can also cause a slow down of web page loading. You may...or may not....notice this.

Time Capsule Double NAT error

Hello,
I would really like some advice on double NAT and bridge mode before I respond to an error message on my mothers macbook/ TC settings. She recently had some extremely high uploads (approx 10GB that ate up all of her allowance) at times when she was not at her computer and so I reset her TC and changed the WEP password to something really obscure to try and prevent anyone from hacking in to her wifi network.
She has a basic set up: Cable modem connected directly to the Time capsule with no other airports connected to the network. She uses a standard 2010 13"Macbook to access the internet over wifi.
Twice in the last week (once before she noticed the massive uploads and today at about the same time as her internet service says she had a 150MB download that she did not have) she has received an error that says:
"Double NAT
This Airport wireless device has a private IP address on its Ethernet WAN port. It is connected to a device or network that is using Network Address Translation (NAT) to provide private IP addresses. You should change your Airport wireless device from using DCHP and NAT to bridge mode"
My question is - will following these instructions fix her download problems or make it worse?
Also, is there any other way I can prevent someone from hacking into her network.
All advice welcome
Thanks
Emma

Having a double NAT, indicates that TWO devices on your network are performing Network Address Translation, I am not a complete expert on this or anything but it's not that big an issue, you probably just need to turn off NAT on your Mom's modem.
But this definitely IS NOT causing her issue of using up all her Data allowance with her ISP. Having a double NAT just complicates the network and can cause problems with certain apps. But It will NOT increase data use.
You should use WPA2 as the type of network encryption.
You can use Mac Address Filtering as some kind of added protection.
You could have a Non Broadcast SSID but this again is really only trivial protection, WPA2 with a STRONG password is your best bet.
Hope this helps,
Anything else I can do just let me know,
PS you should check the DHCP client list or attached client list in Airport settings to see if someone else is using your Mom's bandwidth.
Regards,
John
Message was edited by: JohnAlanWoods - Forgot to include the word 'NOT'

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.

Sprint Airave Causes "double NAT"

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