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Date:      Wed, 23 Jan 2019 08:11:14 +0000
From:      bugzilla-noreply@freebsd.org
To:        pf@FreeBSD.org
Subject:   [Bug 229092] [pf] [pfsync] States created by route-to rules pfsynced without interface
Message-ID:  <bug-229092-16861-qsVlsGtURl@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-229092-16861@https.bugs.freebsd.org/bugzilla/>
References:  <bug-229092-16861@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D229092

--- Comment #13 from Kajetan Staszkiewicz <vegeta@tuxpowered.net> ---
(In reply to Kristof Provost from comment #12)
pfcksum only checks if loaded rules are the same, it does not ensure rules =
are
the same on 2 routers. There are a few ways to have different rulesets, let=
 me
give you a little list I came across while trying to make pfsync work:
- Any rule using interface IP addresses in unnamed table {} will end up bei=
ng
different on 2 routers unless named <table> {} is used.
- Same thing for SNAT rules, although I'm unsure if those are included in
pfchecksum.
- If ruleset is dynamically generated by a script, data structure might not
have explicit ordering and produce different result on each run: for me it =
was
Python and its dictionaries and sets.
- In a dynamical environment it might happen that the ruleset is different =
for
short periods of time when new configuration is applied as it will never be
applied at exactly the same time on both routers. For me on some loadbalanc=
ers
new configuration is applied tens of times a day.

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