Date: Tue, 27 Jan 2015 18:49:23 +1100 From: Aristedes Maniatis <ari@ish.com.au> To: Dimitry Andric <dim@freebsd.org> Cc: freebsd-pf@freebsd.org Subject: Re: meaning of State-mismatch Message-ID: <54C74303.1070601@ish.com.au> In-Reply-To: <CD5F0D06-3738-4786-97C6-68C27D94A5B0@FreeBSD.org> References: <54C72F63.8040908@ish.com.au> <CD5F0D06-3738-4786-97C6-68C27D94A5B0@FreeBSD.org>
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On 27/01/2015 6:46pm, Dimitry Andric wrote: > On 27 Jan 2015, at 07:25, Aristedes Maniatis <ari@ish.com.au> wrote: >> >> I have been unable to find much documentation about the counter called "state-mismatch". I notice it going up on my firewall (FreeBSD 10.1) but only at a slow rate (maybe at around 1 per minute). >> >> What is the significance of this value? Is it indicative of dropped states (and I should be increasing the state timeout)? > > It's not really documented in our pfctl(8) manpage, but the OpenBSD version does > mention it: > > state-mismatch > packet was associated with a state entry, but sequence numbers did not > match > > So maybe something is dropping packets, making holes in the sequence numbers? Or > maybe somebody is trying something sneaky? :) > > -Dimitry Ah, thanks for that. Maybe you could add that doc to the FreeBSD man page. Could it simply be a packet loss issue where a packet is lost and the next packet arrives out of order? Ari -- --------------------------> Aristedes Maniatis ish http://www.ish.com.au Level 1, 30 Wilson Street Newtown 2042 Australia phone +61 2 9550 5001 fax +61 2 9550 4001 GPG fingerprint CBFB 84B4 738D 4E87 5E5C 5EFA EF6A 7D2E 3E49 102A
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