From owner-freebsd-net@freebsd.org Fri May 27 19:02:34 2016 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 8E288B4CEBA; Fri, 27 May 2016 19:02:34 +0000 (UTC) (envelope-from kob6558@gmail.com) Received: from mail-it0-x235.google.com (mail-it0-x235.google.com [IPv6:2607:f8b0:4001:c0b::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 573F913A0; Fri, 27 May 2016 19:02:34 +0000 (UTC) (envelope-from kob6558@gmail.com) Received: by mail-it0-x235.google.com with SMTP id e62so2096106ita.1; Fri, 27 May 2016 12:02:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to; bh=nJS2Je+3RDUc38YB+t6fvDpWhG/fxJJG5Cb7o3y4cJI=; b=q85oDAVOs28GrP3Sn0j/n/qISH9MgvVanY6CYdBxZ3p51JRDy2GuxY2J84jRg//U+S 3Bs/1r326ywQnodBPu05GkXgprgsnGg7pU/0qlpe+5pItoAWzqzaGqJWdnfYMP3rAyEe HHxsEPsaE0asoEV9GSpLbtzvVQtDODxft9ZtdAv6zwzpTw79sTz90bl7bXQKs0VO7OeH p4noT3np2SvEdNzXFjqzQes05iVFXQPfCRjx6EkV8kTFIsCJH0d/9UWx5xUq8QL0A7cs YkW5UDM7+Zo8QIx0ZfhaPj9H+qMnDF54+qmx3vU++6RPiahNjvZKUgxCWhX0k/vVNXrE BzxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:date :message-id:subject:from:to; bh=nJS2Je+3RDUc38YB+t6fvDpWhG/fxJJG5Cb7o3y4cJI=; b=BJp9LHOhoa8pGknshtos2vyXFZw3Ma3aPCapa2o/0uStyoWn2vfm8tFdT+PutFEc69 dk/OO+P9HXe6qbIP46lhwW2JnfUHPIIYH3ZOm2LCD7BZaj8aZYeExRZcbd2Q/PcO0Ph6 I4N5mQ4uZF2sTlkLH8uf534IhPZmTGlrnnKaXP+dF7WO7rOeHFaKr6EqqgaPf4J2fa/D uxvttE/AHE84uLsZAWMsc949YNDosa9BJIAv5X9Mt7DDNL/X0Fc1I4dWdPvsVfpC5WK4 zW7tgQzM99lJ9V07AIBRQholiAzfIeJwBIvKB4pFau8h9IyZ/sNbv4XdqLtxABxSV96D z+HQ== X-Gm-Message-State: ALyK8tLO3RGM8DjYmocYF9IQ3UKqc6zgzW1eiGjw+0f1ProVp2ulEJaz4wNiEYdGOxOCFFXvAdWNlBq+Qiwz4A== MIME-Version: 1.0 X-Received: by 10.36.123.77 with SMTP id q74mr123759itc.44.1464375753778; Fri, 27 May 2016 12:02:33 -0700 (PDT) Sender: kob6558@gmail.com Received: by 10.79.20.70 with HTTP; Fri, 27 May 2016 12:02:33 -0700 (PDT) In-Reply-To: <20160527070901.GA7911@box-fra-01.niklaas.eu> References: <20160519124446.GB2444@box-fra-01.niklaas.eu> <20160523034855.GA37797@box-fra-01.niklaas.eu> <20160524061707.GA77980@box-fra-01.niklaas.eu> <20160526193602.GF49239@box-fra-01.niklaas.eu> <20160527070901.GA7911@box-fra-01.niklaas.eu> Date: Fri, 27 May 2016 12:02:33 -0700 X-Google-Sender-Auth: eB2PKT8HHgolet4H_YlNQkQx0Z0 Message-ID: Subject: Re: IPv6, ULAs and FreeBSD From: Kevin Oberman To: "freebsd-net@freebsd.org" , tinc@tinc-vpn.org, Mailinglists FreeBSD Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.22 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.22 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, 27 May 2016 19:02:34 -0000 On Fri, May 27, 2016 at 12:09 AM, Niklaas Baudet von Gersdorff < niklaas@box-fra-01.niklaas.eu> wrote: > Kevin Oberman [2016-05-26 21:11 -0700] : > > > The most valid use is when you can only get a /64 from your provider. > > I got a /112 for each of my virtual servers... So, I decided to go for > ULAs for the VPN between them. > This is fine, but why not use link-local for the VPN links? That's the primary reason for them. (N.B. I am not aware of your architectural details, and ULAs for the VPNs might be appropriate.) As long as they are properly allocated and statically routed, you can use a /112 or any other prefix length, just don't assume that they will work in any more global environment. -- Kevin Oberman, Part time kid herder and retired Network Engineer E-mail: rkoberman@gmail.com PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683