PTR-Records with Host-Header

[Derek Balling]

At 6:14 PM -0400 4/17/01, Kevin Darcy wrote:

>Most if not all resolver routines only look at the first record in an RRset
>for a reverse lookup. Because of this, BIND does not apply RRset-ordering
>(default "cyclic") to PTR RRsets; otherwise, multi-record PTR RRsets could
>cause non-deterministic, seemingly-random behavior, which can cause
>hard-to-troubleshoot application problems. As it is, the behavior is
>deterministic, but it's a waste to have multi-record PTR's, since
>most-if-not-all resolvers won't see beyond the first one.

One could argue though that, like CNAME's at the root, unless 
something CHANGES this broken behavior by resolvers will continue 
unabated. Perhaps if the cyclic behavior applied equally to PTR 
records, people would fix broken resolvers to  better understand 
multiple PTR RR's. :)

D

-- 
+---------------------+-----------------------------------------+
| dredd at megacity.org  | "Conan! What is best in life?"          |
|  Derek J. Balling   | "To crush your enemies, see them        |
|                     |    driven before you, and to hear the   |
|                     |    lamentation of their women!"         |
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