https://redmine.pfsense.org/journals/69812/diff?detail_id=60252
Bug #14804: Panic when pfsync attempts to synchronize states between hosts with different rulesets...
bugpanicpfsyncattemptssynchronize
https://man.openbsd.org/OpenBSD-7.3/pfsync.4
pfsync(4) - OpenBSD manual pages
manual pagespfsyncopenbsd
https://undeadly.org/cgi?action=article;sid=20090220014805
Redesign of the pfsync Protocol, Part 1
redesignpfsyncprotocolpart
https://www.freshports.org/net/pfflowd/
FreshPorts -- net/pfflowd: Convert pfsync states to NetFlow datagrams
pfflowd converts OpenBSD PF status messages (sent via the pfsync interface) to Cisco NetFlow datagrams. These datagrams may be sent (via UDP) to a host of...
freshportspfflowdconvertpfsyncstates
https://forum.opnsense.org/English_Forums/General_Discussion/Transparent_Filtering_Bridge_+_CARP/pfsync_for_HA
Transparent Filtering Bridge + CARP/pfsync for HA?
Transparent Filtering Bridge + CARP/pfsync for HA?
transparentfilteringbridgecarppfsync
https://man.netbsd.org/NetBSD-10.0/macppc/pfsync.4
pfsync(4) - NetBSD Manual Pages
manual pagespfsyncnetbsd