Re: Zone transfers - Port Requirements

Tech-Archive recommends: Fix windows errors by optimizing your registry

From: Alan Maddison (anonymous_at_discussions.microsoft.com)
Date: 09/14/04 

Date: Tue, 14 Sep 2004 08:18:10 -0700

Thanks for the info. However, I am looking at two w2k3
servers where Zone transfers from the Primary/Master
Server to the Secondary Server are using UDP ports above
1024 for data transfer, after the initial request to Port
53 on the Primary server.

I am trying to understand what these port numbers are and
if they are random if there is a way to configure them.

Alan
>-----Original Message-----
>Hi,
>
>DNS zone transfers use TCP port 53. DNS queries use UDP
port 53.
>
>--
>Todd J Heron, MCSE
>Windows 2003/2000/NT
>
>"Alan Maddison" <anonymous@discussions.microsoft.com>
wrote in message
>news:216a01c49a6a$59e09d80$a401280a@phx.gbl...
>> I am trying to secure a Secondary DNS server using MS
>> TCP/IP filtering. However when a zone transfer is
>> initiated the process attempts to open a UDP port(s)
>> presumably above 1024. Does anyone know if there is a
>> consistent port number associated with this process or
if
>> I can force it to use a particular port number. The
goal
>> being to minimize the number of UDP ports that are
>> allowed through the filter.
>>
>>
>> Thanks.
>>
>> Alan
>
>
>.
>

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