On 27 Aug 2014, at 06:31 , Jonathan Price <free...@jonathanprice.org> wrote:
> On 2014-08-27 01:40, Peter Wemm wrote: >> On Tuesday 26 August 2014 10:40:27 free...@jonathanprice.org wrote: >>> Hello, >>> >>> I am configuring a server with IPv4 and IPv6 addresses and have noticed that >>> FreeBSD seems to be preferring IPv4, such as when establishing SSH >>> connections. >>> >>> After reading through /etc/defaults/rc.conf, and later /etc/rc.d/ip6addrctl >>> I have come to the conclusion that I have two ways to tell FreeBSD to >>> prefer IPv6: >>> >>> 1) Add ipv6_activate_all_interfaces to /etc/rc.conf >>> 2) Add ip6addrctl_policy="ipv6_prefer" to /etc/rc.conf >>> >>> Could anybody with a little more knowledge on the matter explain to me which >>> of the two options is more preferential? >> >> They both do different things. >> >> The activate knob is to enable ipv6 on an interface. To oversimplify it, if >> you configure an address on an interface, it is "enabled". However, this >> switch enables this on all the rest of the interfaces, even the ones you >> didn't configure. >> >> ip6addrctl* affects things like hostname lookups to sort the addresses >> returned >> to the caller. >> >> They are different things entirely. I think you are expecting the behavior >> that ip6_prefer policy gives you. That's what we use in the freebsd.org >> cluster to have it use ipv6 where possible. >> > > Hi, and thanks for the response. > > Would it be possible to go into a little detail as to what > ipv6_activate_all_interfaces="YES" does to interfaces which don't explicitly > have an address configured? I can’t appear to find much information on this > option. man rc.conf has a description (which I should probably read myself;-) in case that gets you a bit further. I think it’s a “backward compat helper” to the old ipv6_enable=“YES” switch which existed before we could enable IPv6 on a per-interface base. > However, it does sound like for my purposes it would make more sense to use > ip6addrctl_policy=“ipv6_prefer" as that is more explicitly the feature I > want, rather than getting it inadvertently through the other knob. Yes. Definitively. I am not sure if it has happened but if IPv6 config is configured through rc.conf that setting should be(come) default. Bjoern — Bjoern A. Zeeb "Come on. Learn, goddamn it.", WarGames, 1983 _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
