[strongSwan] what could cause strongswan 4.3.2 to freeze up

[Martin Willi]

Hi,

> - Tunnels already established remained operational but no new
> connection accepted. We verified with tcpdump that connection requests
> arrive at the box (a Vyatta VM) but /var/log/messages showed no charon
> activity.

Maybe all the threads are blocked somewhere and therefore the daemon is
unable to handle new requests. A good way to see what's going on is to
attach gdb to charon and invoke:

> thread apply all bt

This should tell you what all the threads are doing.

Regards
Martin