What do the ‘F’ flags mean in the output of fwaccel conns?

Here’s the fwaccel conns legend:

-bash-3.1# fwaccel conns -help
Usage: fwaccel conns

Options:
-m – max number of entries to print
-f – print only entries matching the filter
-s – print only number of connections
-h – this help message

Filter (one or more of the below flags):
F/f – forwarded to firewall/cut-through
U/u – unidirectional/bidirectional
N/n – entries with/without NAT
A/a – accounted/not accounted
C/c – encrypted/not encrypted
P/p – partial/not partial
S/s – pxl enabled/disabled
Q/q – qxl enabled/disabled
H/h – offloaded to SAM hardware/created in SAM hardware