[30634] in North American Network Operators' Group
RE: lame delegations
daemon@ATHENA.MIT.EDU (Karyn Ulriksen)
Mon Aug 21 12:20:13 2000
Message-ID: <0127E258EE29D3118A0F00609765B44847CB35@dhcp-gateway.sitestream.net>
From: Karyn Ulriksen <kulriksen@publichost.com>
To: "'woods@weird.com'" <woods@weird.com>
Cc: "'nanog@merit.edu'" <nanog@merit.edu>
Date: Mon, 21 Aug 2000 09:16:53 -0700
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> Unless I misunderstand what you mean, my version of BIND (8.2.2p3)
> doesn't do that.
>
> $ host -a 2.254.92.204.in-addr.arpa
> 2.254.92.204.in-addr.arpa PTR most.weird.com
> 2.254.92.204.in-addr.arpa PTR mail.weird.com
Interesting. I actually haven't tried this since BIND 4. It made sense
that it wouldn't so I assumed it shouldn't and further assumed that in BIND
8 that it didn't as well. (Sorry about that last sentence!) Anyways, I
think you catch up with me in your next paragraph here ...
So does the reverse resolve work correctly with the two PTR responses for
most resolvers?
Karyn
>
> I don't think it round-robins them though (that's the order
> they appear
> in my zone file and several queries in a row always return
> them in that
> order -- I've not read the code recently so I don't remember
> for sure),
> because normally you don't want to round-robin them, and if
> you did you
> wouldn't be able to distinguish between the primary host and
> its aliases
> with the BIND resolver library:
>
> $ host -a 204.92.254.2
> Name: most.weird.com
> Address: 204.92.254.2
> Aliases: mail.weird.com
>
> (The "primary", or "official" hostname comes from the
> "h_name" field of
> "struct hostent", which is returned by gethostbyaddr() and friends.)
>
> > << Yes, I know what kind of flack that this
> > will lead to, but the logic isn't that wierd...
>
> I can't give you any flack about multiple PTRs, I use them too! :-)
>
> --
> Greg A. Woods
>
> +1 416 218-0098 VE3TCP <gwoods@acm.org>
> <robohack!woods>
> Planix, Inc. <woods@planix.com>; Secrets of the Weird
> <woods@weird.com>
>
