[Openswan Users] Openswan servers behind NAT connection fails

Tuomo Soini tis at foobar.fi
Thu Jan 18 02:34:48 EST 2007


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Utkarsh Shah wrote:

> I don't think that ADSL modem is blocking 4500 or any other port as 
> other connection with same network scenario is working fine. In those
> connection both the servers are behind NAT-box.

Hey, You have ADSL modem doing NAT? That explains NAT-T not working
properly. You need to disable ipsec passthrough from your NAT router or
NAT-T won't work as it shoud.

IPsec passthrough in NAT device is generally incompatible with IPsec
NAT-Traversal.

- --
Tuomo Soini <tis at foobar.fi>
Linux and network services
+358 40 5240030
Foobar Oy <http://foobar.fi/>
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