[strongSwan] received retransmit of response with ID 0, but next request already sent

[Thomas Egerer]

Axel, just another idea: maybe your peer and charon don't
have the same understanding of the key exchange and derive
a different shared secret. Hence the failure with the first
encrypted packet. Can you initiate the tunnel from the
other side? If you set the log facility enc to level 4 ([1])
you should see some helpful information in your log (with
a debug version you can even see the keys!).

Cheers,
Thomas

[1] 'stroke loglevel enc 4'