Re: I-D ACTION:draft-nward-v6ops-teredo-server-selection-00.txt

[Rémi Denis-Courmont <rdenis@simphalempin.com>]

On Fri, 06 Jul 2007 09:57:50 +1200, Perry Lorier <perry@coders.net> wrote:

> Web browsers have "Web Proxy Automatic Discovery".  They look up the

> name "wpad" which gets searched for in the usual dns search path.  Thus

> if you're 192-0-2-1.dsl.example.com it will look up

> "wpad.dsl.example.com" then "wpad.example.com".  If either of these

> exist then it will use them.

> 

> To be honest this system is fragile and unreliable, but it is precedent

> for a "name" to find a service based on a hard coded dns name.



Yeah, and to take a more v6ops-ish thing, "some" ISATAP client

implementations try to resolve "isatap" to autoconfigure their ISATAP

gateway.



But unless you insert a "wpad."/"isatap." entry into the root DNS zone,

it does not work in this particular case. In fact, even then, if would

not work as many DNS caches are "clever" not to recurse queries for

non-FQDN (and will take any "single-piece" name to be non-FQDN).



Of course, it could go that you try to resolve "teredo" and if that does

not work, you use the anycast address.



-- 

Rémi Denis-Courmont

http://www.remlab.net/