Date: Sun, 2 Dec 2018 22:36:09 +0100 From: "O. Hartmann" <o.hartmann@walstatt.org> To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Cc: "Christoph Moench-Tegeder" <cmt@burggraben.net>, "O. Hartmann" <ohartmann@walstatt.org>, freebsd-current@freebsd.org Subject: Re: ipv6/ppp: FreeBSD obtains linklocal on tun0 only Message-ID: <20181202223636.5adde7f7@thor.intern.walstatt.dynvpn.de> In-Reply-To: <FB285269-71FD-4ED0-87A5-ED82AE84ED6C@lists.zabbadoz.net> References: <20181130131259.1654aee3@thor.intern.walstatt.dynvpn.de> <20181130155937.GA74153@elch.exwg.net> <FB285269-71FD-4ED0-87A5-ED82AE84ED6C@lists.zabbadoz.net>
next in thread | previous in thread | raw e-mail | index | archive | help
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Am Fri, 30 Nov 2018 16:41:02 +0000 "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> schrieb: Sorry for the late reply, had a long weekend off ... > On 30 Nov 2018, at 15:59, Christoph Moench-Tegeder wrote: > > > ## O. Hartmann (ohartmann@walstatt.org): > > > >> As far as I know, with the IPv4 stack a IPv4 address is obtained > >> automatically, so I would expect the same for IPv6. > > > > The fun with "automatically" is that there's more than one way... > > DHCPv6 and NDP (IPV6 Neighbour Discovery Protocol/Router Solicitation) > > have been mentioned, the third option is IPV6CP (PPP options, just as > > PPP-with-IPv4 does with IPCP). I've no idea what your provider does, so... > > No, IPV6CP, to my very best 15 year old memory only negotiates the > interface identifiers, which are used to generate the link-local addresses. > There is no negotiation for full prefix/global addresses, hence it is > different to the IPCP NCP used for IPv4. In my case. IPV6CP indeed does only negotiate the linklocal addresses (fe80::) on my WAN interface ... > > One wants to run rtsol on the link and then depending on the O/M bits possibly > also DHCPv6 I’d assume. > > There’s a couple of other options and shortcuts, on how to configure global > addresses (as always, if you know you have a static prefix assigned, one can > do it by hand for example); and then there are shortcuts as to when you’d > perform DAD, which shouldn’t bother the user. These days there should also > be options with regards to RFC4941 (privacy extensions for stateless address > autoconf). Studying the manpage for ppp(8), one might not get that IPV6CP does only negotiate the IPv6 linklocal address ... > > It may no be uncommon to run the ptp-link with link-local addresses only and > configure an address from a prefix on lo0 or the internal interface only; but > I am doubtful FreeBSD’s userland implementation is that sophisticated. > > /bz > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" - -- O. Hartmann Ich widerspreche der Nutzung oder Übermittlung meiner Daten für Werbezwecke oder für die Markt- oder Meinungsforschung (§ 28 Abs. 4 BDSG). -----BEGIN PGP SIGNATURE----- iLUEARMKAB0WIQQZVZMzAtwC2T/86TrS528fyFhYlAUCXARQZAAKCRDS528fyFhY lMXRAf9RE7lygi/eqfkL5U+iAWiQYDEmuITolg6sOpyqMVUIKZeg1zA1HQL8Cw70 7vMSc6Rwbvtuz8b8N+chelawH4dxAf9K2Rs9O+cw91PRO0CNN+JcuRnk/gj/ivYo pn24sPi8MIoXOOecR2WSLg1e0uspStEBGr0kdxPJ0aJBNVu1AuLd =cnfs -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20181202223636.5adde7f7>