Hostsystem kernel compiles with IPFW.
VNET jail with IPFW enabled.
ifconfig ipfw create -> kernel panic.
Should be fixed in 11.0.
There's still minor other bugs left related to tables in ipfw which cause problems but VIMAGE support in 11 should be much better.
(In reply to Bjoern A. Zeeb from comment #1)
Oh, fixed in stable/11 and head as of last night. So might be worth giving stable/11 a shot if you can.
Can you test with 11.0?
(In reply to Ed Maste from comment #3)
tested with 11.0
It works as expected.