Great Circle Associates Firewalls
(July 1996)
 

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Subject: Re: Well Known Port Numbers
From: Neil A Carson <neil @ ivision . co . uk>
Date: Wed, 10 Jul 1996 15:38:13 +0100 (BST)
To: Irwin Lazar <lazar @ netevolve . com>
Cc: firewalls @ greatcircle . com
In-reply-to: <9607101332 . AA12409 @ netevolve . com>

On Wed, 10 Jul 1996, Irwin Lazar wrote:

> Greetings all:
> 
> I'm trying to find the well known TCP and UDP port numbers to allow 
> access to Usenet and WAIS but can't seem to find them in any of the 
> reference materials I have.  Does anyone know of or have this 
> information?

On a unix box, try looking in /etc/services. Or use the NIS services file,
by typing ypcat services.

This yields
z39.50          210/tcp    wais         #ANSI Z39.50
z39.50          210/udp    wais         #ANSI Z39.50
nntp            119/tcp    usenet       #Network News Transfer Protocol
nntp            119/udp    usenet       #Network News Transfer Protocol

on a FreeBSD box here.

Unless of course you have stripped down the services file (which one would
do in building a firewall anyway).

    Yours Aye,

    Neil

* Neil A Carson
* Internet Vision Ltd.
* E-Mail: neil @
 ivision .
 co .
 uk, Phone: (0171) 589 4500




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