From owner-freebsd-net@freebsd.org Sat Nov 18 17:55:08 2017 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1C4F1DC0922 for ; Sat, 18 Nov 2017 17:55:08 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247]) (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 A630777661 for ; Sat, 18 Nov 2017 17:55:06 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221] (may be forged)) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id vAIHsuvN073099 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 18 Nov 2017 18:54:56 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: vas@mpeks.tomsk.su Received: from [10.58.0.4] ([10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id vAIHsq6U021442 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Sun, 19 Nov 2017 00:54:52 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: OpenVPN vs IPSec To: Victor Sudakov , freebsd-net@freebsd.org References: <20171118165842.GA73810@admin.sibptus.transneft.ru> From: Eugene Grosbein Message-ID: <5A1073E9.5050503@grosbein.net> Date: Sun, 19 Nov 2017 00:54:49 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2 MIME-Version: 1.0 In-Reply-To: <20171118165842.GA73810@admin.sibptus.transneft.ru> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=2.2 required=5.0 tests=BAYES_00, LOCAL_FROM, RDNS_NONE autolearn=no autolearn_force=no version=3.4.1 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 2.6 LOCAL_FROM From my domains * 1.9 RDNS_NONE Delivered to internal network by a host with no rDNS X-Spam-Level: ** X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on hz.grosbein.net X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 Nov 2017 17:55:08 -0000 18.11.2017 23:58, Victor Sudakov wrote: > Is there any reason to prefer IPSec over OpenVPN for building VPNs > between FreeBSD hosts and routers (and others compatible with OpenVPN > like pfSense, OpenWRT etc)? > > I can see only advantages of OpenVPN (a single UDP port, a single > userland daemon, no kernel rebuild required, a standard PKI, an easy > way to push settings and routes to remote clients, nice monitoring > feature etc). But maybe there is some huge advantage of IPSec I've > skipped? OpenVPN may be fine for very simple setups. It is unusable for demanding cases like parallel site-to-site VPN tunnels with dynamic routing for same network prefix between such primary/backup tunnel; for other setups that need distinct full-blown network interface for each tunnel to process with SNMP agent/routing daemon/packet filters etc. because distinct OpenVPN instances cannot share routing correctly in beetween. In short, OpenVPN just is not designed to play nice and standard-compiliant way with other parts of the system and sometimes that's unacceptable. And sometimes that's irrelevant.