conntrackd(8) on Linux
The text cacd2aee57eb, as Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
netfilter connection tracking user-space daemon
Flags it lists
-
-B -
-F -
-R -
-c -
-d -
-e -
-f -
-h -
-i -
-k -
-n -
-s -
-t -
-v -
-x