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Re: "bad udp cksum" messages from client ipsec connection
From: Albert Chin (openbsd-misc
mlists.thewrittenword.com)
Date: Mon Nov 27 2006 - 10:39:08 CST
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On Thu, Nov 23, 2006 at 09:22:32PM -0600, Albert Chin wrote:
> We have someone connecting from an FC4 host running Openswan 2.4.4
> behind a firewall to our VPN server running OpenBSD 4.0. They are able
> to establish a connection ok but tcpdump shows a bad cksum value for
> pings from the client connection:
> # tcpdump -avs 1440 -e -ttt -i fxp4 host 60.44.70.140 and port ipsec-nat-t
> [tcpdump output snipped]
> ...
>
> I've tested both an FC4 and FC5 client behind an OpenBSD 4.0 firewall
> connecting to the same OpenBSD 4.0 VPN server and I don't have any
> problems.
>
> Anyone with ideas on why this is happening? The client is behind a
> Panasonic DN-C200NC firewall (VOIP/NAT/...).
The client replaced the Panasonic DN-C200NC firewall with a NetBSD
server and all is working now.
--
albert chin (chinathewrittenword.com)
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