[RFCI-Discuss] Interesting Question

[Derek J. Balling]

On Dec 4, 2005, at 2:22 PM, Abuse Desk wrote:
> C:\>dig @A.GTLD-SERVERS.NET yahoo.com
>
> ; <<>> DiG 9.2.3 <<>> @A.GTLD-SERVERS.NET yahoo.com
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41
> ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 5

Yeah, but doing that fails to notice the case of:

EXAMPLE.COM IN NS EXAMPLE.COM
EXAMPLE.COM IN A  a.b.c.d

That's *not* invalid, although it *is* stupid.

It took a Linux Users Group I used to be a member of about two years  
to finally sort out why some percentage of their traffic would always  
go to the old site, and it was because they'd never eliminated a poor  
choice of glue records. :-)

>> And, bonus points to anyone except Ralf or Phil Kizer who can guess
>> why I noticed this discrepancy....
> It looks like you're working on the bogusmx full-dns-tree-traversal
> code.  Good luck with that!

Shhhhh, it may even be done and in testing. (Well, the perl version  
is, although I suspect the PHP version will just call out to the perl  
version to get the data it needs, because it was that complicated,  
and I have no idea how I'd do 3/4 of it in PHP without a really nice  
resolver library to work with... since all the PHP resolver engines  
suck ass).

D


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