From owner-freebsd-net@freebsd.org Fri Nov 30 10:27:57 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 07BA6113DF2A for ; Fri, 30 Nov 2018 10:27:57 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:d12:604::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 3B2587AFA1; Fri, 30 Nov 2018 10:27:45 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13:0:0:0:5]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id wAUARakB025471 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 30 Nov 2018 11:27:36 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: bu7cher@yandex.ru Received: from [10.58.0.4] ([10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id wAUARZkv098802 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Fri, 30 Nov 2018 17:27:35 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: IPsec: is it possible to encrypt transit traffic in transport mode? To: "Andrey V. Elsukov" , Lev Serebryakov , freebsd-net@freebsd.org References: <1519156224.20181130021136@serebryakov.spb.ru> From: Eugene Grosbein Message-ID: Date: Fri, 30 Nov 2018 17:27:24 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00,LOCAL_FROM,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.0 SPF_PASS SPF: sender matches SPF record * 2.6 LOCAL_FROM From my domains X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: 3B2587AFA1 X-Spamd-Result: default: False [-3.71 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; MX_INVALID(0.50)[greylisted]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[grosbein.net]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; R_SPF_PERMFAIL(0.00)[]; NEURAL_HAM_SHORT(-0.93)[-0.925,0]; IP_SCORE(-2.19)[ip: (-4.33), ipnet: 2a01:4f8::/29(-3.93), asn: 24940(-2.66), country: DE(-0.02)]; FREEMAIL_TO(0.00)[yandex.ru]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Nov 2018 10:27:57 -0000 30.11.2018 16:22, Andrey V. Elsukov wrote: > There is one problem. IPsec won't handle inbound packets, that are not > destined to your IP address. Inbound packets are handled based on the > destination address, protocol and SPI value, so if ip_input() doesn't > decide that ESP packet is for your host, it will not invoke > IPSEC_INPUT() and encrypted packet will be routed as is. That's why I use gif tunnels for such packets :-)