RE: IPv6 IPSec incompatibilities between 2.6.23 and 3.6.18 (and probably later)

 > On the receiving side (e.g. fd01:1b10:1000::1) I see the decrypted packets with

the 2.6.23 kernel:
but NOT with the newer kernel:

Hi Joerg,

First steps to debug this would be:
cat /proc/net/xfrm_stat
ip -s xfrm state
ip -s xfrm policy

First command will show some error accounting, which can point to the culprit code.
Second and third command will show existing objects, and some statistics like when the last packet was used with them.

Last thing - for your safety you should keep those session keys private.

Ilan.