[H-GEN] DNS Pains

Nikolai Lusan nikolai at humbug.org.au
Mon Jul 29 21:10:19 EDT 2002


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Hi all,

I am experinceing some DNS oddities at the moment and was hoping someone
here might have a better take on what or why than I do.

After recieving a call from a customer who "could not connect to a web
site" I did some poking ... from my nameserver I could do a successful
dig/host on the sitename (www.noosaweddingring.com), however from any
machine that was using said nameserver as a refferer - like the squid
proxy or a dialup machine - the response was "no servers could be
found".  Then we noticed another oddity while trying to follow a
slashdot link, www.ocmelbourne.com was not reporting an A name in a dig
or host but ocmelbourne.com was - and in both cases the correct the
authoritave servers were being reported.

I am not filtering port 53 (tcp or udp) anywhere nor do I have any ACL's
on DNS stuff. In all cases when records where pulled from whois to find
authoritive name servers the servers could be contacted on port 53 with
telnet, and yet the correct responses did not come back.


I am truely baffled as to why a small part of the DNS system seems to
dislike my network.


Nikolai


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