[19871] in North American Network Operators' Group
Re: UDP packet/DNS server
daemon@ATHENA.MIT.EDU (Aaron Goldblatt)
Tue Sep 29 18:38:26 1998
Date: Tue, 29 Sep 1998 17:19:33 -0500
To: nanog@merit.edu
From: Aaron Goldblatt <aglists@goldblatt.net>
In-Reply-To: <Pine.LNX.4.04.9809280026330.3759-100000@justin.net>
>I think you mean port 53. This is both TCP and UDP. I thought DNS
>used both TCP and UDP. Thus firewall that is blocking UDP traffic will
>cause zone updates to fail.
>name 42/udp nameserver
>whois 43/tcp nicname # usually to sri-nic
>domain 53/tcp
>domain 53/udp
Queries are done via UDP; zone transfers are always fully TCP.
ag
