Disable TCP/53

Joseph S D Yao jsdy at center.osis.gov
Fri Feb 22 12:55:43 UTC 2002

On Thu, Feb 21, 2002 at 02:49:10PM +0800, Tan Chun Han/ITNOC/PBB/PBBG wrote:
> hi phn, as far as i know, DNS should use UDP/53 only and not TCP, that =
> is
> why
> our FW is configured for UDP, unless there's zone transfers. as for our=
> case, this
> is only our Internal DNS for it to resolve MX records and www addresses=
> .
> therefore we don't need TCP/53 for name server resolving.

As you've been told many times, your knowledge is limited, and DNS
_does_ use TCP 53 for more than just zone transfers.

Joe Yao				jsdy at center.osis.gov - Joseph S. D. Yao
OSIS Center Systems Support					EMT-B
   This message is not an official statement of OSIS Center policies.

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