[Openswan Users] Troubleshooting ipsec/l2tp

Paul Young paul at arkig.com
Mon Oct 21 21:52:56 UTC 2013

It sounds like both clients are within the same IP range. You'll probably
find that the first machine to connect is ok and the 2nd machine will not
be able to connect simply because of the IP range.

If you look in /var/log/secure you should see something about the tunnel
already being in use (I am paraphrasing) for the 2nd machines connection.

On 22 October 2013 05:18, klas <openswan at k.flum.net> wrote:

> I've got two machines in the same LAN. Both have (as far as I can tell)
> identical configurations for ipsec and xl2tpd. Once machine can connect
> as client to the server, the other one can't.
> The clients and the server are both behind NAT.
> ipsec seems to come up fine for both machines, but machine 2 is not
> able to set up l2tp. It's sending one packet and gets no answer.
> Any pointers about how to troubleshoot this?
> Thanks
> Klas
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> Micropayments: https://flattr.com/thing/38387/IPsec-for-Linux-made-easy
> Building and Integrating Virtual Private Networks with Openswan:
> http://www.amazon.com/gp/product/1904811256/104-3099591-2946327?n=283155
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