named not resolving past CNAME?
bobvance at alumni.caltech.edu
bobvance at alumni.caltech.edu
Fri May 5 20:13:04 UTC 2000
I don't know why it behaves this way, but I think that it must be
"normal".
It happens to me with a similar setup:
HP-UX internal DNS
Sun external DNS (forwarder)
I've only noticed it with www.yahoo.com.
It also happens with a Linux internal DNS running 'named' 8.2.2-p5
and forwarding to the same servers.
I've used both 8.1.1 and 4.9.7 versions of 'nslookup' on the HP-UX,
and 8.2.2-p5 'nslookup' on the Linux box.
-----------------------------------------------
Tks | BVance at sbm.com
BV | BobVance at alumni.caltech.edu
Sr. Tech. Consultant, SBM
Vox 770-623-3430 11455 Lakefield Dr.
Fax 770-623-3429 Duluth, GA 30097-1511
===============================================
-----Original Message-----
From: news at dejanews.com [mailto:news at dejanews.com]On Behalf Of
drahbany at my-deja.com
Sent: Thursday, May 04, 2000 1:07 PM
To: comp-protocols-dns-bind at moderators.isc.org
Subject: named not resolving past CNAME?
Hello gurus,
I am not by any stretch a DNS expert, and I'm having a rather strange
problem that I hope you can help resolve. I have an "internal" DNS
server (running HP-UX 10.20) that is authoritative for "internal" or
local domains. All other queries are forwarded to a DNS server (running
RH Linux 6.0) as specified by the "forwarders" line in /etc/named.boot.
So, here's the problem: If I do an "nslookup" on www.yahoo.com, the
server returns an error saying "no address information found".
If I do an nslookup specifying CNAME as the querytype for www.yahoo.com,
the server replies with the canonical name for www.yahoo.com, which is
www.yahoo.akadns.net.
Then, if I do an nslookup on www.yahoo.akadns.net the server returns a
list of IP addresses associated with that host.
Finally, if I do an nslookup again for www.yahoo.com, the server returns
a list of IP addresses associated with that host - as I would have
expected with the FIRST QUERY!
I've attached the transcript of the scenario I just described (note:
I've changed my internal named/addresses to protect the innocent).
Please help if you can!
TRANSCRIPT FOLLOWS:
//nameserver/roots # nslookup -ty=A www.yahoo.com
Name Server: nameserver.mydomain.com
Address: 192.168.100.100
Trying DNS
looking up FILES
*** No address information is available for "www.yahoo.com"
//nameserver/roots # nslookup -ty=CNAME www.yahoo.com
Name Server: nameserver.mydomain.com
Address: 192.168.100.100
Trying DNS
Non-authoritative answer:
www.yahoo.com canonical name = www.yahoo.akadns.net
Authoritative answers can be found from:
yahoo.com nameserver = ns1.yahoo.com
yahoo.com nameserver = ns2.dca.yahoo.com
yahoo.com nameserver = ns3.europe.yahoo.com
yahoo.com nameserver = ns5.dcx.yahoo.com
ns1.yahoo.com internet address = 204.71.200.33
ns2.dca.yahoo.com internet address = 209.143.200.34
ns3.europe.yahoo.com internet address = 194.237.108.51
ns5.dcx.yahoo.com internet address = 216.32.74.10
//nameserver/roots # nslookup -ty=A www.yahoo.akadns.net
Name Server: nameserver.mydomain.com
Address: 192.168.100.100
Trying DNS
Name: www.yahoo.akadns.net
Addresses: 204.71.200.75, 204.71.200.67, 204.71.200.68, 204.71.202.160
204.71.200.74
//nameserver/roots # nslookup -ty=A www.yahoo.com
Name Server: nameserver.mydomain.com
Address: 192.168.100.100
Trying DNS
Non-authoritative answer:
Name: www.yahoo.akadns.net
Addresses: 204.71.200.67, 204.71.200.68, 204.71.202.160, 204.71.200.74
204.71.200.75
Aliases: www.yahoo.com
END OF TRANSCRIPT.
THANKS FOR YOUR HELP,
David Rahbany
Sent via Deja.com http://www.deja.com/
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