Maintained by: NLnet Labs

[Unbound-users] C-root IPv6 patch

Stephan Lagerholm
Sun Mar 30 22:23:56 CEST 2014


Hi Johan,

> >> So before you apply the patch or change your roots-hints file,
> please
> >> check that you have v6 connectivity.
> >
> > Well, not applying the patch won't prevent your cache from trying
> > C-root's IPv6 address, because a priming query will give you the IPv6
> > address. The patch just makes unbound's internal hints consistent
> with
> > the published root hints and the priming query.
> >
> >> It is unfortunate that the v6 address of c-root is not reachable
> >> everywhere on the internet. Maybe you or somebody else can check
> >> connectivity via the atlas probes?
> 
> Most v6 addresses are not reachable everywhere on the Internet. Most
> ISPs are still not providing v6 connectivity over DSL, just to give one
> example. 

Well if you don't have a v6 interface, then unbound or any other application will not try to connect over IPv6. I have v6 connectivity but no connectivity to c-root so somebody is wasting 500 ms of my time every now and then when unbound tries to connect to c-root. A mini version of the happy-eyeball http issue if you wish...