Yes, it works. I had accidentally disabled ESP and AH protocols
in /etc/sysctl.conf (thinking I had *enabled* them by un-remarking
NEVER configure a machine when it's too late at night. Should
have known better.
BTW, Hans-Joerg, the 3.8 machine is tunneling OK with the 3.6
machine, even without the -T option (looks weird, but I'm pinging...).
Are you still interested in the debug output? In case, drop me a