Hi,

we have the task to setup a vpn tunnel between a remote network and a
vpn gateway (astaro firewall) which is located behind my shorewall (like
in this setup: http://jixen.tripod.com/ -> Subnet-to-Subnet
configuration with a NATed gateway. but with other IPs ;-))

I'd like to find out, if the problem is the shorewall or the astaro
firewall.

So far the gateways can communicate through our shorewall (ping,
tracerout, https-access), but the VPN ID is wrong (thats the information
I do get from the remote admin.).

The remote connection is established to the public ip aaa.aaa.aaa.aaa,
but the response is from the private ip bbb.bbb.bbb.bbb.

I'v read about NAT Traversal (NAT-T) and read the shorewall
dokumentation (http://www.shorewall.net/VPNBasics.html and
http://www.shorewall.net/manpages/shorewall-tunnels.html) but I'm not
sure, that I'v understand everything right.

May be you could give me a hint on the following question:

- Do I have to set up a tunnel config on my shorewall? (I thought it
would be enough to set up nat-to-nat from the public IP to an internal
IP and open the requierd ports from the remote gateway to the internal
gateway.)

All I've read so far concernes traffic between the shorewall an other
hosts (like described here:
http://www.shorewall.net/manpages/shorewall-tunnels.html) and not the
traffic between two remote hosts.


Thanks for any hints pushing me into the right direction!


Best regards

Götz Reinicke
-- 
Götz Reinicke
IT Koordinator

Tel. +49 7141 969 420
Fax  +49 7141 969 55 420
E-Mail [EMAIL PROTECTED]

Filmakademie Baden-Württemberg GmbH
Mathildenstr. 20
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www.filmakademie.de

Eintragung Amtsgericht Stuttgart HRB 205016
Vorsitzender des Aufsichtsrats:
Dr. Christoph Palmer, MdL, Minister a.D.

Geschäftsführer:
Prof. Thomas Schadt



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