DNS header format for Query requests
Marc.Thach at radianz.com
Marc.Thach at radianz.com
Tue Oct 9 15:47:03 UTC 2001
Sounds like the pesky CD bit (DNSSEC aware resolver) that Kevin so kindly
pointed out to me some time ago.
Marc TXK
James Raftery
<james-bind-use To: bind-users at isc.org
rs at now.ie> cc:
Sent by: Subject: DNS header format for Query requests
bind-users-boun
ce at isc.org
09/10/2001
15:41
Hi,
I'm trying to diagnose a problem with a piece of equipment that
seems to be sending badly formed DNS queries. I need to get an accurate
description of the Header format for a Query request but the maze
of RFCs is melting my brain.
Is the Header format in RFC1035 still correct and complete for
Opcode 0 (Query) requests? I know it's been amended for other Opcodes,
Update for instance.
Specifically tcpdump is seeing Headers with the fourth byte set to
0x40: which mean the first ``Z'' bit is set. Have any of the Z bits
been defined for Query requests?
Thanks,
james
--
James Raftery (JBR54)
"It's somewhere in the Red Hat district" -- A network engineer's
freudian slip when talking about Amsterdam's nightlife at RIPE 38.
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