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Date:      Fri, 4 Jun 2021 19:47:31 +0100
From:      Pete French <petefrench@ingresso.co.uk>
To:        Chris <bsd-lists@bsdforge.com>
Cc:        stable@freebsd.org
Subject:   Re: pf starts blocking all traffic after a short while
Message-ID:  <a4f51ae9-216b-c682-725d-15a004c846c2@ingresso.co.uk>
In-Reply-To: <f70dbbd8cec0ea0f2490ff6842c94975@bsdforge.com>
References:  <E1lp6Mt-000Nhj-V7@dilbert.ingresso.co.uk> <f70dbbd8cec0ea0f2490ff6842c94975@bsdforge.com>

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> OK I may be completely off the mark here. But I seem to remember something
> about potential problems with fragment reassembly on IPv6. Just for kicks,
> does the problem still manifest if you comment
> scrub all max-mss 1200 fragment reassemble
> Again, I may be off the mark here, as I don't exactly remember where/when
> I read about it. But just thought I'd throw it out there in case it helped.

Actually, yes, this is true, and in most other places I use pf I have 
the rule:

pass quick inet6 proto ipv6-frag all keep state

in pf.conf. But this time I forgot. However I just tried
adding that though, and it hasnt helped. All IPv4 traffic as
well as IPv6 gets dropped when it starts dropping stuff, so
I dont think this is Ipv6 related.

Good memory though, I had forgotten that ;-)

-pete.



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