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Error 721 When connecting to VPN using an Airport Extreme

I would like to set it up as a gateway on a network with a windows server that will handle the DNS and DHCP as well as RAS. There does not seem to be an option to turn off DHCP do I setup a scope of 192.168.57.1-192.168.57.2 with a lease time of 9999 days.

Now the main problem occurs when trying to dial into the server remotely. The VPN client returns an error 721. This error typically indicates that the client is talking to the server however it cannot authenticate properly. I have setup port mapping to the server for 1723 and 1701 however it will not connect. Typically enabling ipsec will fix this error however I do not see that option. When I "enable default host" and point it to the server it works however this is not acceptable as is a major security risk as well as limits the ability to forward additional ports to other servers. Am I missing something?

Many, Mac OS X (10.4.10)

Posted on Oct 24, 2007 8:32 PM

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6 replies

Nov 5, 2007 7:33 PM in response to Neil D'Souza

We are not looking for a solution from Microsoft for this one. The router has to support Protocol 47 aka GRE in order for this to work. I just got off the phone with apple a little while ago. This is a know issue and they are working on a solution.

Hopefully this will be fixed soon as the base station is by far the best consumer router on the market. However not supporting GRE is a deal breaker unfortunately.

Nov 6, 2007 12:15 AM in response to Shurafa

I talked to Apple Support here in Belgium yesterday.

All they could (would?) say was that Protocol 47 and Port 1723 have to be open on the vpn server. The vpn administrator had told me that both are open. Since there seems no end to this problem - and teh multiple vpn access is important for us -, I decided - for the first time in 16 years - to return a product to Apple.

I am now back to the Airport Express base station which works slower - but to my full satisfaction. Nevertheless I hope that Apple will fix the problem with ABEX.

Error 721 When connecting to VPN using an Airport Extreme

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