Forwarding Mystery Meat

Christine Tran Christine.Tran at Sun.COM
Wed Apr 4 20:52:47 UTC 2001



Got call about forwarder going haywire. All this stuff is behind
an intranet, so not possible to diagnose from outside.

unhappy host is ns1.voodoo.net, slave for zone booksellers.com;
wants to have zone type forward for nyc.booksellers.com.

ns1.booksellers.com is master & authoritative for booksellers.com
and nyc.booksellers.com

turnning on debug on ns1.voodoo.net (192.168.40.240)

1 req: nlookup(www.nyc.booksellers.com) id 23064 type=1 class=1
2 req: found 'www.nyc.booksellers.com' as 'booksellers.com' (cname=0)
3 ns_req: answer -> [192.168.40.240].42888 fd=22 id=23064 size=94 rc=3
4 datagram from [192.168.40.240].42889, fd 22, len 48

line 4 is probably ns1.voodoo.net answering that it didn't know about
www.nyw after looking in zone booksellers.com.  Logical.

5 req: nlookup(www.nyc.booksellers.com.voodoo.net) id 23065 type=1 class=1
6 req: found 'www.nyc.booksellers.com.voodoo.net' as 'voodoo.net' (cname=0)
7 ns_req: answer -> [192.168.40.240].42889 fd=22 id=23065 size=103 rc=3

So it appends voodoo.net to query and tries to look it up, no cigars
either.  The story would end here, but for the fact that I'm assured by
hostmasters that this setup WORKED until a Monday afternoon 2 weeks ago.
They WERE able to resolve forwarded queries for nyc.booksellers.com.
Another hostmaster for ns1.japan.voodoo.net has same setup, corroborated
that his stuff stopped working about the same time.  This is hard to
refute, I wasn't there.  I can't see that anything is wrong with 
ns1.booksellers.com, the forwarded query never even got there. 
ns1.voodoo.net made up its mind that www.nyc should be searched for
in booksellers.com, ignoring the directive to forward:

zone "nyc.booksellers.com" IN {
        type forward;
        forwarders {
                10.10.40.240;
        };
};

So, I put it to the experts, should this have EVER worked?  Two very sane
people are convinced it did.  They run 8.2.2p5 on Solaris 5.7 x86.

CT



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