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Date:      Fri, 5 Aug 2016 00:12:37 +0800
From:      Julian Elischer <julian@freebsd.org>
To:        "Andrey V. Elsukov" <ae@FreeBSD.org>, lev@FreeBSD.org, Ian Smith <smithi@nimnet.asn.au>
Cc:        freebsd-ipfw@freebsd.org, "Alexander V. Chernikov" <melifaro@freebsd.org>
Subject:   Re: IPFW: more "orthogonal? state operations, push into 11?
Message-ID:  <3c3d7026-ea60-c0dd-527b-edd841274585@freebsd.org>
In-Reply-To: <6c2ebc59-c5b8-5be0-8842-897b2de44d1f@FreeBSD.org>
References:  <9229d4f7-8466-57b0-c954-117736102bd7@FreeBSD.org> <5755F0D3.9060909@FreeBSD.org> <5759DB79.10205@FreeBSD.org> <3d09497c-136c-e217-154c-ba00e6879c6f@freebsd.org> <20160616005016.A15883@sola.nimnet.asn.au> <d7bef617-70a4-f761-7d09-9413eb720b11@freebsd.org> <64d6bdea-fa32-f16f-2fdd-abd33d54d04e@freebsd.org> <46d5cfde-c4ac-ebd0-3c13-2759037621f3@FreeBSD.org> <11a5d41b-109a-434b-e8e0-7ed2826a8cc9@FreeBSD.org> <ee745842-c33e-4e73-f84c-6eb11f283b51@FreeBSD.org> <a3e98e25-4c0d-56ad-5640-0b6f13ebeb21@freebsd.org> <6c2ebc59-c5b8-5be0-8842-897b2de44d1f@FreeBSD.org>

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On 4/08/2016 6:50 PM, Andrey V. Elsukov wrote:
> On 04.08.16 06:42, Julian Elischer wrote:
>> so it's a combination of #1 and #2 in my list.  I think I originally
>> thought of having just #1.
>>
>> A combination is less useful for me as you need to do:
>>
>> 20 skipto 400 tcp from table(2) to me setup record-state
>> 21 skipto 400 tcp from table(2) to me setup
>> to make the entire session do the same thing.
> So, in your example what wrong with just using keep-state?
> "record-state without immediate action" == "keep-state without implicit
> check-state" needed to solve issues with NAT or something similar, that
> was described by Lev.
>
because keep-state is a check-state for ALL packets going past, 
regardless of whether they match the pattern.

at least that's what I have observed.






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