An adopted article adapted here:

1) UPnP
UPnP, which stands for Universal Plug and Play, is a massively complex standard that does about a million different things. Among all these different capabilities lies the Internet Gateway Device protocol, which allows LimeWire to ask the router to open required ports for it. By default this is usually port 6346.

UPnP is supported by most home routers made in the last couple of years, with the notable exception of Apple's Airport Base Stations.

2) NAT-PMP
NAT-PMP happened when Apple looked at the giant mess that is UPnP and decided they'd rather make their own protocol. They were a little slow in getting it out, but as of July 2005 with Airport 4.2, Apple's Airport Extreme and Airport Express base stations now support it. It's completely unrelated to UPnP, but the end result is the same, and you, the user, should not see any difference.

Unfortunately, NAT-PMP is off by default. To enable it, first make sure you have Airport 4.2 or later (available in Software Update), then run the AirPort Admin Utility. If it asks you to update your base station's firmware, make sure that you do so, as NAT-PMP requires the latest firmware. Go to the "AirPort" tab and click the "Base Station Options..." button. In the sheet that drops down, turn on the "Enable NAT Port Mapping Protocol" checkbox in the "Ethernet Port Security" tab. Ignore the erroneous note Apple has placed regarding 10.4 - LimeWire will work with NAT-PMP on OS X 10.3 as well (see sample image below.) Click OK, then click Update and the router will restart. As with UPnP, you'll have to restart LimeWire for it to be able to see the change.

3) If you have problems with NAT-PMP or your OSX version doesn't support it, then you may need to manually forward the necessary port for LimeWire. See Configuring AirPort Extreme for LimeWire

Attached Images

natpmp.jpg (5.6 KB, 52 views)

i tried to configure my airport extreme for limewire, but when i click on tools, there is no "options" option.

Check the other menu options then on the AirPort Admin Utility. It may be listed under one of those. I don't have an apple airport so I can't check. If you find it can you report back as to where you found it.

oh, i meant that when i'm in limewire, i clicked tools, but there was no "option" option.

Oh ... Command comma. ⌘ , or click on the LimeWire name next to the apple icon at the top left of menu bar & a menu will appear. Choose preferences. Then go to Advanced>Firewall Configuration. Sample image though that sample is for port forwarding. For NAT-PMP choose UPnP in LW.

ok... did the firewall configuration in LW. changed the port to 55000...
selected UPnP... restarted LW and it's still showing a firewall down at the bottom of the screen. jeeeeeez.

Is your OSX firewall active? If yes, is it configured to allow LW full access? See instructions at the top of this thread Connection problems? Check here first! (click on link)

Also, I'm not sure about airport. I do know some devices you need to reboot in order to properly save the settings (as in my router.) Check your settings were properly saved in airport manager. Also consider temporarily disconnecting the airport. I'm not sure how it operates so ... Also consider rebooting computer.

Also, are there any other connection devices besides the airport?

i don't have the airport base thing... it's really just my laptop... i'm not sure how it's connecting to the internet. like i said, i think it's picking up my neighbor's signal and connecting that way...
thanks for your help... i'll keep trying!!!

Hey i am using a cable LAN ethernet connection in my university on a mac, limewire does nto detect a connection, i tried everything, even allowing the firewall but doesnt work, wat to do?!?!?

I am Trying to set up limewire on my new macbook, this is my first time using a mac so forgive me if I am apple ignorant.
I went to Airport admin utility
It did not ask me to update probably because I run updater often.
but I did not see an "Airport" Tab.
Or anything like Base Station options...
Hopin for help
thanks, bye


e in Software Update), then run the AirPort Admin Utility. If it asks you to update your base station's firmware, make sure that you do so, as NAT-PMP requires the latest firmware. Go to the "AirPort" tab and click the "Base Station Options..." button. In the sheet that drops down, turn on the "Enable NAT Port Mapping Protocol" checkbox in the "Ethernet Port Security" tab. Ignore the erroneous note Apple has placed regarding 10.4 - LimeWire will work with NAT-PMP on OS X 10.3 as well (see sample image below.)

srry bout posting that part of ur message, I was just showin it as referance

I don't have an airport so I can't tell you. But I presume you will need to have your AirPort connected/turned on before the AirPort Admin Utility will be able to give options. I opened the utility & went to help. I then typed in NAT-PMP to search & results came up with options of how to set up.

AirPort Extreme, Express: Using the NAT Port Mapping Protocol for faster .Mac syncing

If you're a .Mac member and have iDisk Syncing and/or .Mac data syncing enabled on two or more computers, you can speed up the synchronization process by turning on the NAT Port Mapping Protocol (NAT-PMP) on your AirPort Extreme Base Station or AirPort Express. Before we show you how to do this, make sure that you meet the following requirements:

Each computer must have Mac OS X 10.4.2 or later.
Each computer must have AirPort software 4.2 or later.
If using Airport Extreme, it must have firmware 5.6 or later.
If using Airport Express, it must have firmware 6.2 or later.
AirPort Extreme or AirPort Express must be the device that is sharing your Internet connection (it must be the NAT router).
Learn how to update Mac OS X and AirPort software.
Learn how to update AirPort Extreme or Express firmware.

Enabling the NAT Port Mapping Protocol

In the Finder, choose Utilities from the Go menu.
Open Airport Admin Utility.
In the resulting Select Base Station window, select your Airport Extreme or AirPort Express from the list.
Click Configure, then enter the base station password when prompted.
Click the Base Station Options button.
Select the Enable NAT Port Mapping Protocol checkbox.
Click OK.
Click the Update button and wait for the base station to restart.
After your Airport Extreme or AirPort Express restarts, NAT-PMP will be enabled.

About iDisk Syncing and NAT-PMP

If you enable iDisk Syncing in the .Mac pane of System Preferences, or any other .Mac-based sync service, making a change to a synchronized item on one computer will result in the same change being made to another computer on which you have the feature enabled.

NAT-PMP speeds up this process by allowing .Mac servers to initiate contact with other Macintosh systems behind your NAT router as soon as an iDisk update occurs. Otherwise, the sync will occur when another one of your computers initiates contact with the server, which might take up to an hour.

thanx for the help.
My limewire is working all great now.
TY,
~Nevermore~

I tried the above which you suggested changing ports etc, and things just seemed to get more and more complicated.

I am really gutted I cant use Limewire especially after paying. I have tried so many things to get a stronger signal and I still am left with 1 bar only. ; (