From owner-freebsd-pf@freebsd.org Thu Dec 5 04:24:39 2019 Return-Path: Delivered-To: freebsd-pf@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 50B9F1BA113 for ; Thu, 5 Dec 2019 04:24:39 +0000 (UTC) (envelope-from vas@sibptus.ru) Received: from admin.sibptus.ru (admin.sibptus.ru [IPv6:2001:19f0:5001:21dc::10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 47T2gB16L2z3G0Q for ; Thu, 5 Dec 2019 04:24:37 +0000 (UTC) (envelope-from vas@sibptus.ru) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sibptus.ru; s=20181118; h=In-Reply-To:Message-ID:Subject:To:From:Date; bh=Aac700V+R81PY/2d/trDCA7ilZliCSq8Hs1e6/4+Qiw=; b=Q3OfW7rCU8Y4XJKGDB99dkNFTc EJ5Mmz40l2T6yCcBIMtxzpJpPkh9RhK0+fNxbkUng25EGUgTWlvMhPTltuseHhGGpV7xs46WBBNog 43ReyHAXnoRm5zhdGTnldjOfXoSSbUaMz/90HzW5zv03aCA4ULRhuI/eQfvjlLHQPvnI=; Received: from vas by admin.sibptus.ru with local (Exim 4.92.3 (FreeBSD)) (envelope-from ) id 1icigt-0005P2-PS for freebsd-pf@freebsd.org; Thu, 05 Dec 2019 11:24:35 +0700 Date: Thu, 5 Dec 2019 11:24:35 +0700 From: Victor Sudakov To: freebsd-pf@freebsd.org Subject: Re: pf's states Message-ID: <20191205042435.GA19962@admin.sibptus.ru> References: <20191202025642.GA99174@admin.sibptus.ru> <90c1b342-b88a-a9bc-d475-4e6cd027f25c@als.nnov.ru> <20191202134047.GA14183@admin.sibptus.ru> <0c189ef5-61a3-209b-84a1-9982fde94073@als.nnov.ru> <20191204140000.GA96563@admin.sibptus.ru> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="UlVJffcvxoiEqYs2" Content-Disposition: inline In-Reply-To: <20191204140000.GA96563@admin.sibptus.ru> X-PGP-Key: http://admin.sibptus.ru/~vas/ X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 User-Agent: Mutt/1.12.2 (2019-09-21) X-Rspamd-Queue-Id: 47T2gB16L2z3G0Q X-Spamd-Bar: -------- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=sibptus.ru header.s=20181118 header.b=Q3OfW7rC; dmarc=pass (policy=none) header.from=sibptus.ru; spf=pass (mx1.freebsd.org: domain of vas@sibptus.ru designates 2001:19f0:5001:21dc::10 as permitted sender) smtp.mailfrom=vas@sibptus.ru X-Spamd-Result: default: False [-8.48 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[sibptus.ru:s=20181118]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCPT_COUNT_ONE(0.00)[1]; IP_SCORE(-3.38)[ip: (-9.87), ipnet: 2001:19f0:5000::/38(-4.94), asn: 20473(-2.05), country: US(-0.05)]; DKIM_TRACE(0.00)[sibptus.ru:+]; DMARC_POLICY_ALLOW(-0.50)[sibptus.ru,none]; SIGNED_PGP(-2.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:20473, ipnet:2001:19f0:5000::/38, country:US]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-pf@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Technical discussion and general questions about packet filter \(pf\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Dec 2019 04:24:39 -0000 --UlVJffcvxoiEqYs2 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Victor Sudakov wrote: > Max wrote: [dd] > >=20 > > Or you can create "pass out on $dmz..." rule. >=20 > Yeah, that sounds great. The ping responses begin to arrive at 192.168.1= 0.3! > Victory! You know what! If I create a "pass out on $dmz..." rule, no rules on $inside are necessary any more. pfctl shows only *one* state, but this time it is sufficient: root@fw:~ # pfctl -vvs rules No ALTQ support in kernel ALTQ related functions disabled @0 pass in on vtnet1 all flags S/SA keep state [ Evaluations: 15 Packets: 0 Bytes: 0 States: 0 = ] [ Inserted: uid 0 pid 1262 State Creations: 0 ] @1 block return in on vtnet1 inet from any to 192.168.0.0/16 [ Evaluations: 1 Packets: 1 Bytes: 84 States: 0 = ] [ Inserted: uid 0 pid 1262 State Creations: 0 ] @2 pass out on vtnet1 all flags S/SA keep state [ Evaluations: 1 Packets: 0 Bytes: 0 States: 0 = ] [ Inserted: uid 0 pid 1262 State Creations: 0 ] root@fw:~ # root@fw:~ # pfctl -vvs states No ALTQ support in kernel ALTQ related functions disabled all icmp 192.168.10.3:63234 -> 172.16.1.10:63234 0:0 age 00:00:11, expires in 00:00:09, 11:11 pkts, 924:924 bytes, rule 2 id: 000000005de88142 creatorid: 68441fab root@fw:~ # Now 192.168.10.3 can ping 172.16.1.10 and receive echo replies, 172.16.1.10 cannot ping 192.168.10.3. Don't you think there is something non-trivial or even incorrect about the way states are evaluated? --=20 Victor Sudakov, VAS4-RIPE, VAS47-RIPN 2:5005/49@fidonet http://vas.tomsk.ru/ --UlVJffcvxoiEqYs2 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJd6IaDAAoJEA2k8lmbXsY0IYUIAIck74EMMDpv+vqoDpwxIE+I exMcI6MJ/D6p12cTQp5Vdbjnrsp74XQrDRxPyymzP+p36g6BpU/iLqmDGM8aFPWf gCDgBHLHlFxTJFhZ9WOXe5jGZdtL9iQu6lOcA6gI0tX5U0UaeHgmtuEla2P1Ro5N IA6AT5qKbCIjevd2dS7lvztDv61KvAuSrEtPsk/CoklmQHvQcsTYvK0yywXnVLER D3Q38daLFUV8JWQXbVJLVrhbNkkLe3Zm0/PuNtk+AzMIb8mqF3tRjZnYUPBV7abm W7hOtLhu1cb5J5exrojY/BSCZq1dCMw1TymBTfX2wQmz8lCklVsNXf1HDYwz1jM= =6yG1 -----END PGP SIGNATURE----- --UlVJffcvxoiEqYs2--