Home page logo
/

fulldisclosure logo Full Disclosure mailing list archives

RE: DNS query???
From: Mortis <m0rtis () adelphia net>
Date: Wed, 28 Jul 2004 07:24:50 -0400

> Just forgot to mention that the source port
> and destination port 53
> mentioned is UDP protocol

I'm copying you personally this time in case you missed my message yesterday.

There is no mystery about DNS servers using port 53 to send queries to other servers port 53. This is how DNS works on a Windows box. [ () 1]

You do not understand DNS. You also don't understand something about your configuration (or something about how servers refer queries to other servers). Read the links I sent you. [ () 2][@3]

Search the newsgroup I pointed you to [ () 4] or find another similar one - someone else has probably asked this question before. I can't remember the last time I couldn't answer my own question with a google search. Spend a little time on it.

If you have no luck, trace the traffic on your secondary server using ethereal [ () 5] See it talk to the primary and/or the root server. Use ethereal to figure out why.

Using ethereal is a basic skill. If you don't know it, learn it. There are newsgroups for that, too, so please don't post your questions about it here. Things are much more productive when you go to the right place. And safer.

If you can't figure it out, take the ethereal output, clean it up, and post it to the newsgroup I pointed you to and ask them for help. People are just sitting there waiting for issues like yours. They like DNS. They care.

Spend some time putting together all of the relevant data. A statement like "the forwarder is correctly set" means nothing. No one can help you with that information [ () 6] If it was correct you wouldn't have a problem/question.

Document all of the settings in the properties boxes for both servers, change the names and ips, and post that. Do you have recursion checkboxes set? Root hints? Complete posts get accurate answers.

[ () 1] http://www.google.com/search?q=dns+server+port+53+udp

[ () 2] http://support.microsoft.com/search/default.aspx?Query=DNS

[ () 3] http://www.dns.net/dnsrd/rfc/

[ () 4] http://groups.google.com/groups?group=microsoft.public.win2000.dns

[ () 5] http://www.ethereal.com/

[ () 6] http://www.catb.org/~esr/faqs/smart-questions.html

--
Mortis

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]