[strongSwan] strongSwan on a KVM VPS does not work

[Tobias Brunner]

Hi,

> the client is a roadwarrior and want get a virtual ip, from the log it
> seems it got the virtual ip, however the ping from server to client does
> not work.

Does it work in the opposite direction?  Please also try to verify
whether it is the ICMP request or the response that gets lost.

Is the client also running strongSwan?  Version, config?  Are there any
errors logged?

> 04[NET] sending packet: from 64.62.209.183[4500] to 121.63.63.197[4500]
> 01[NET] received packet: from 121.63.63.197[4500] to 64.62.209.183[4500]
> 01[ENC] parsed INFORMATIONAL request 8 [ ]
> 01[ENC] generating INFORMATIONAL response 8 [ ]
> 
> The above shows that there are a lot of strange message betweent the
> server and client.

These messages look like DPD packets sent by the client.  How is DPD
configured there?

Regards,
Tobias