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Disabling Network Address Translation on OSX

by JustbeFRANK / January 17, 2010 10:43 PM PST

Hi there techies and wonderkids

I can not seem to sync my mac or enable "back to my mac" because I am being told that "I may have more than one device on my network providing Network Address Translation. Well, this is news to me. I have a Time capsule running my network and an Airport Express with Airtunes dvice and they have been hooked up for more than two years. I have been abloe to sync my network up until recently and I do not recall making any changes to any network configurations so I am clueless as to why things suddenly stopped working in this regard.

THe error message tells me to disable Network Address Translation on one of the devices but does not tell me how to do that. Nor can I find any information related to Network Address Translation on the help database.

Does anyone out there know how to do this?

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Other than the time capsule
by mrmacfixit Forum moderator / January 18, 2010 12:19 AM PST

do you have any other router on the network?

If you have DSL, you may have a modem/router supplied by your ISP. If this is the case, then use Airport Utility to turn off NAT on the Time Capsule. Turn off the DHCP server too.

The Express is also a router, use Airport Utility to check that NAT is not used there.


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Disabling Network Address Translation on OSX???
by JustbeFRANK / January 18, 2010 1:57 AM PST

Thank you so much for getting back to me.

I do have a DSL Router, and the time capsule, and the airport.

They have been working fine together for years and I had not changed anything (or so I think) and so while I suspected the conflict was in there somewhere, with one of the Apple devices, I still could not figure out how to use Airport utility to configure or amend NAT on any of them. I tried to look for this option, presuming it was the Airport Express that was causing me the trouble. I just don't know enough and my biggest fear is doing something wrong and screwing up my network.

Where would I find that capability within the Airport utility?

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So I dug out my old Airport Extreme
by mrmacfixit Forum moderator / January 18, 2010 8:50 AM PST

and found that NAT was located under the Internet icon and is a tab by itself.

Check to see that it's not on.


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Disabling Network Address Translation on OSX???
by JustbeFRANK / January 19, 2010 1:34 AM PST

can you e-mail me a screenshot? I can not find anything related to NAT under the internet tab on airport utility OSX v10.5.8

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