Date: Fri, 23 Jan 1998 07:54:25 -0800 (PST) From: Chris Timmons <skynyrd@opus.cts.cwu.edu> To: Jesper Skriver <jesper@skriver.dk> Cc: John-Mark Gurney <gurney_j@resnet.uoregon.edu>, John Polstra <jdp@polstra.com>, Garrett Wollman <wollman@khavrinen.lcs.mit.edu>, hubs@FreeBSD.ORG Subject: Re: need for another cvsup site? Message-ID: <Pine.BSF.3.96.980123075003.6590A-100000@opus.cts.cwu.edu> In-Reply-To: <Pine.BSF.3.96.980123092917.24852B-100000@freesbee.t.dk>
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When I saw John-Mark's message I wondered about the compliance of such a
technique with the applicable RFC's. About the only thing I could find
was a snippet from the old BIND faq, included in the v8 distribution as
doc/misc/FAQ.2of2. This statement is attributed to Vixie in the context
of some sort of hack using multiple CNAMES.
570 Note that having multiple CNAME RR's at a given name is
571 meaningless according to the DNS RFCs but BIND doesn't mind
(in
572 fact it doesn't even complain). If you call
573 gethostbyname("hydra.ugly.vix.com") (try it!) you will get
I get the feeling that it is one of those things which is not required by
a name server implementation; BIND at some point apparantly provided the
functionality and as of v8 may no longer do so.
-Chris
On Fri, 23 Jan 1998, Jesper Skriver wrote:
> On Tue, 20 Jan 1998, John-Mark Gurney wrote:
>
> > John Polstra scribbled this message on Jan 20:
> > > Yes, that would be a lot better. You simply give cvsup.freebsd.org
> > > three A records, and then the DNS system round-robins the order of
> > > them in each response, right?
> >
> > actually, you can do this with CNAME's even:
> > test IN CNAME boron
> > IN CNAME argon
> > IN CNAME hydrogen
>
> No! It isn't "legal", and BIND 8.x won't accept it.
>
> > hydrogen,ttyqh,~,514#host test
> > test.nike.efn.org is a nickname for hydrogen.nike.efn.org
> > hydrogen,ttyqh,~,515#host test
> > test.nike.efn.org is a nickname for boron.nike.efn.org
> > hydrogen,ttyqh,~,516#host test
> > test.nike.efn.org is a nickname for argon.nike.efn.org
> >
> > so:
> > cvsup IN CNAME cvsup1
> > IN CNAME cvsup2
> > IN CNAME cvsup3
>
> It works with BIND 4.x, but ...
>
> /Jesper
>
> --
> Jesper Skriver (JS249-RIPE), Network manager
> Tele Danmark Internet (TDI1-RIPE)
>
> One Unix to rule them all, One Resolver to find them,
> One IP to bring them all and in the zone bind them.
>
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