From owner-freebsd-net@freebsd.org Tue Feb 19 12:37:04 2019 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 BF79A14EFB53 for ; Tue, 19 Feb 2019 12:37:04 +0000 (UTC) (envelope-from freebsd@disroot.org) Received: from knopi.disroot.org (knopi.disroot.org [178.21.23.139]) (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 2886585780 for ; Tue, 19 Feb 2019 12:37:02 +0000 (UTC) (envelope-from freebsd@disroot.org) Received: from localhost (localhost [127.0.0.1]) by disroot.org (Postfix) with ESMTP id 789F2290F7 for ; Tue, 19 Feb 2019 13:36:55 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at disroot.org Received: from knopi.disroot.org ([127.0.0.1]) by localhost (disroot.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bu8SNAy4i-bU for ; Tue, 19 Feb 2019 13:36:54 +0100 (CET) Subject: Re: Point-to-point using GRE over IPv6 -> not possible with a single /128 address on the server? DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=disroot.org; s=mail; t=1550579814; bh=qVY647S6C2hFUNePgEeFVqnpqF5yWpAJ357EpglS8/4=; h=Subject:To:References:From:Date:In-Reply-To; b=i0eRc//UTrPJEGXRAU2+kxNGCvFbLFhFxhDPMJXCAbB4ofR5J3yaj7WkvKMs17RqC Zs8+niTAJ4l6+vCrvjuHSuhVpgdZH09wep8mPJ9xAj1rBfAIrxKUjspeR3z3aYKvnX 2jiYAOyuEA1kioGYET7gtzIISldOeR07BIW29flRocqknuk2jHZKERoLjZ4EMkTjg6 tqPUTCEFy0X6mW8DmZBxUZQc+Bv1y/NtpxY2L9oZG59WxcnVOqSEBxM9nLHUygb3N5 AIoObLdm7Q0nE7djtneAibvNN57xx7SgGRXJ9GIP6MmAJ29yVL2q1/ScFyyfSyECUi Lkzx0CHtfFX3w== To: freebsd-net@freebsd.org References: <95d8e3ea-af36-4d14-f280-908f92a96515@disroot.org> From: "Peter G." Message-ID: <9ab1a9b1-e1e3-9f48-2c3e-35454bcd6e77@disroot.org> Date: Tue, 19 Feb 2019 13:36:49 +0100 Mime-Version: 1.0 In-Reply-To: <95d8e3ea-af36-4d14-f280-908f92a96515@disroot.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 2886585780 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=disroot.org header.s=mail header.b=i0eRc//U; dmarc=pass (policy=none) header.from=disroot.org; spf=pass (mx1.freebsd.org: domain of freebsd@disroot.org designates 178.21.23.139 as permitted sender) smtp.mailfrom=freebsd@disroot.org X-Spamd-Result: default: False [-2.79 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; R_DKIM_ALLOW(-0.20)[disroot.org:s=mail]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+a]; MV_CASE(0.50)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCVD_COUNT_THREE(0.00)[3]; RCVD_TLS_LAST(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_TRACE(0.00)[disroot.org:+]; MX_GOOD(-0.01)[disroot.org]; RCVD_IN_DNSWL_NONE(0.00)[139.23.21.178.list.dnswl.org : 127.0.10.0]; NEURAL_HAM_SHORT(-0.82)[-0.819,0]; DMARC_POLICY_ALLOW(-0.50)[disroot.org,none]; IP_SCORE(-0.46)[asn: 50673(-2.34), country: NL(0.02)]; FROM_EQ_ENVFROM(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:50673, ipnet:178.21.23.0/24, country:NL]; MID_RHS_MATCH_FROM(0.00)[] 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: Tue, 19 Feb 2019 12:37:05 -0000 On 15/02/2019 17:49, Peter G. wrote: > Now the GRE tunnel > >> ifconfig gre6 create >> ifconfig gre6 inet6 fc01:e::100 fc:02:e::200 tunnelfib 6 > #ifconfig: ioctl (SIOCAIFADDR): File exists > > Why is this not possible? Isn't the logic behind it the same as with > IPv4? If not, why not? > > Does this mean it is not possible to have a point-to-point using IPv6 on > a machine with only a single /128 address? Is this a stupid question, or something of the sort? Because I truly don't understand why this wouldn't work. Thanks. PG