nanog mailing list archives

RE: UDP packet/DNS server


From: Tatsuya Kawasaki <tatsuya () giganet net>
Date: Mon, 28 Sep 1998 14:40:04 +0900 (JST)

Raymond,

Thnx for a quick reply.
I checked with the person in the charge of the host.
He could not telnet 53 my host. So I believe that is the problem

Since they did not like to have zone transfer.
I create to record to pass "NS" to that host via tying

xyz.com.   IN NS  that.host
*.xyz.com  In NS  that.host

and it works fine when I type www.xyz.com,which give me the 
A record but  ... in the daemonlog, I see

Sep 28 14:34:06 auth2 named[8958]: Ready to answer queries.
Sep 28 14:34:16 auth2 named[8958]: bad referral (xyz.com !<
*.xyz.com)
Sep 28 14:34:16 auth2 named[8958]: bad referral (xyz.com !<
*.xyz.com)


Any suggestion? what did I do?



かわさき
TK3197

= = = = = =
Business Network Telecom (BNT)
ビジネスネットワークテレコム株式会社
〒111-0053 東京都台東区浅草橋3-8-5
31山京ビル6階
TEL 03-5687-3945   FAX 03-5687-6009
http://www.giganet.net

On Sun, 27 Sep 1998, Raymond Forbes wrote:

It is possible that the router or the firewall is not allowing connections,
that would be the only way to explain what you are seeing.

ray

----------
From:       Tatsuya Kawasaki[SMTP:tatsuya () giganet net]
Sent:       Sunday, September 27, 1998 9:33 PM
To:         Raymond Forbes
Subject:    RE: UDP packet/DNS server

I have tried to get zone transfer via dig. it failed.
None get back. I have looked at their named.conf.
I did not see any restriction on it.

I could not receive zone transfer from a host.
So if someone log in the the host telnet 53 to my host.
If telnet is sccuessful then zone transfer is possible.
But telent from my host to the host, and telent failed does not
 really means anything?

TIA

Tatsuya





????
TK3197

= = = = = =
Business Network Telecom (BNT)
??????????????????
?111-0053?"??s'??????3-8-5
31????6?
TEL 03-5687-3945   FAX 03-5687-6009
http://www.giganet.net

On Sun, 27 Sep 1998, Raymond Forbes wrote:

zone transfers are not done by UDP.  They are TCP.  A couple of ways you
can
test is to telnet to port 53 and see if you make a connection.  Also, if
you
do nslookup and then ls domain name this is equivilant to doing a zone
transfer.

hope this helps.

ray

----------
From:   Tatsuya Kawasaki[SMTP:tatsuya () giganet net]
Sent:   Sunday, September 27, 1998 8:44 PM
To:     nanog ml
Subject:        UDP packet/DNS server

Hello Nanog,

I am trying get zone trasfer from a host, but it seems that because of
firewals?, I can not get any record.
They acknowelged that there is a host behind the firewalls but they
claim
it should not affect it. (I don't believe it.) 
But I don't know how to check/prove that  if certain host can
receive/send an UDP packet.


TIA,

Tatsuya


????
TK3197

= = = = = =
Business Network Telecom (BNT)
??????????????????
?111-0053?"??s'??????3-8-5
31????6?
TEL 03-5687-3945   FAX 03-5687-6009
http://www.giganet.net







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