Re: UDP packet/DNS server

[Mathias Koerber <mathias () staff singnet com sg>]

On Sun, 27 Sep 1998, Matthew Petach wrote:

| Date: Sun, 27 Sep 1998 21:11:32 -0700 (PDT)
| From: Matthew Petach <mpetach () netflight com>
| To: Tatsuya Kawasaki <tatsuya () giganet net>
| Cc: nanog () merit edu
| Subject: Re: 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.
| 
| Zone transfers are handled via TCP, not UDP.  See if you
| can telnet to port 51 on their nameserver; if you can't

That's port 53...

| get a connection established,  you won't be able to do
| a zone transfer.
|  
| > TIA,
| > Tatsuya
| 
| Matt
| 

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