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New Member

XP IPSec client through NAT router to IOS IPSec router

Hello,

perhaps this setup is not possible? I am trying to use the built-in IPSec on a XP client to connect to an IPsec router using des and md5. The client must get to the router (tunnel endpoint) through another router performing NAT on it's interface connected to the internet. It looks like the isakmp sa is setup, but after security is negotiated, the router in between will not perform NAT. It's logging a translation failed (a) message. I checked for this error which says that IP subnet zero must be enabled...which it was/is. Anyone ever try this or have and suggestions? Thanks.

John.

2 REPLIES
New Member

Re: XP IPSec client through NAT router to IOS IPSec router

Hi,

Yes ... XP native vpn client (L2TP over IPSec) doesn't work behind NAT... There are note in the documentation / Tips on Cisco site.... =)

Kevin

New Member

Re: XP IPSec client through NAT router to IOS IPSec router

Hi Kevin. I thought I read this at some point while searching Cisco's site. Thanks for verifying this for me.

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