"Unrelated Additional Info" from Windows 2000 Active Directory servers

Adam Hooper adamhooper at videotron.ca
Tue Oct 2 14:48:12 UTC 2001


Hello :)

At our company we have a Linux box, "carbon", running BIND 8.2.4 and
serving the world with lovely DNS information about "domainA" for all to
behold. We also have two Windows 2000 Active Directory servers, both
serving our internal network with lovely DNS information about
"domainB". domainA only includes DNS entries for servers which are
visible to the entire world; domainB includes all the internal computers
here (except a few Linux boxes and the computers we haven't migrated to
Windows 2000).

DomainB's computers use "carbon" as their primary DNS server, and so
"carbon" transfers all internal domainB queries/updates to "resin", one
of the Win2k servers. Here's the entry in named.conf:

zone "domainB" {
        type forward;
        check-names ignore;
        forward only;
        forwarders { 192.168.1.202; };
};

The internal win2k server "resin" also handles reverse DNS lookups for
domainB. Here's the entry for that forward in carbon's named.conf:

zone "1.168.192.in-addr.arpa" in {
        type forward;
        check-names ignore;
        forward first;
        forwarders { 192.168.1.202; };
        file "rev.1.168.192";
};

All is running well. But when checking out our named log, we see
something odd:

Oct  2 08:54:09 carbon named[595]: unrelated additional info
'resin.domainB' type A from [192.168.1.202].53
Oct  2 08:55:48 carbon last message repeated 2 times
Oct  2 08:56:57 carbon last message repeated 2 times
Oct  2 09:03:26 carbon last message repeated 2 times
Oct  2 09:09:03 carbon last message repeated 2 times
Oct  2 09:09:03 carbon last message repeated 3 times
Oct  2 09:09:03 carbon named[595]: unrelated additional info
'fca.domainB' type A from [192.168.1.202].53
Oct  2 09:09:03 carbon named[595]: unrelated additional info
'resin.domainB' type A from [192.168.1.202].53
Oct  2 09:09:38 carbon last message repeated 24 times
Oct  2 09:21:26 carbon last message repeated 2 times
Oct  2 09:23:19 carbon last message repeated 2 times
Oct  2 09:28:57 carbon last message repeated 2 times
Oct  2 09:31:14 carbon last message repeated 2 times

The Windows 2000 server "resin" also have a bunch of stuff in its DNS
log, but I don't know if it's related or not. It's event ID 3150:

The DNS server wrote version 63 of zone 1.168.192.in-addr.arpa to file
1.168.192.in-addr.arpa.dns.

This also happens too often to be right, especially since the version
number hardly ever increments.

These are the only error messages that ever pop up and I don't know what
they mean or if they're bad. Searching around Google has led me to
believe that 1. this is not a severe error and 2. not many people have
seen this before ;).

Any ideas on what's going wrong? Our DNS knowledge is limited. I'm
thinking the "unrelated additional info" message may be occurring every
time a client updates its DNS entry in domainB but I may be wrong.

Thanks,

Adam Hooper
adamhooper at videotron.ca



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