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Path: utzoo!linus!decvax!decwrl!ucbvax!fair
From: fair@ucbvax.ARPA (Erik E. Fair)
Newsgroups: net.mail
Subject: Re: ARPA hosts in pathalias format
Message-ID: <10254@ucbvax.ARPA>
Date: Sun, 1-Sep-85 08:03:36 EDT
Article-I.D.: ucbvax.10254
Posted: Sun Sep  1 08:03:36 1985
Date-Received: Mon, 2-Sep-85 08:59:43 EDT
References: <6900006@mirror.UUCP> <10227@ucbvax.ARPA>
Organization: University of California at Berkeley
Lines: 36

Other things that are wrong with this:

	Anything labeled `-tac' is not a host with mail addresses,
	it is a Terminal Access Controller (a password protected
	network terminal box that speaks TCP/TELNET).

	In a large fraction of cases, things labeled `-gw' are not
	hosts with mail addresses.

	If you are going to do this, you must use ONLY the official
	host name, because there are collisions in some of the
	aliases. (e.g. topaz.arpa & ucbtopaz both have an alias
	`topaz'; fortunately, ucbtopaz is not registered with the NIC).

	As Jordan noted, there are name collisions between UUCP sites,
	and the aliases of some arpanet hosts.

	I note that nowhere did you use the full domain names of the
	hosts, which means that where ever you attempted to use the
	official name of a host, it is still incorrect. The current
	official host name for ucbvax is ucb-vax.arpa, soon to be
	ucb-vax.berkeley.edu.

If this list was taken from a UNIX /etc/hosts file, allow me to suggest
the following script for collecting the next list of names:

awk -e '{print $2}' /etc/hosts | egrep -v '-gw\.|-tac\.'

If it was taken from the NIC Host Table, use this:

awk -F: -e '/^HOST/ && $5 != "TAC" {split($3,names,",");print names[1]}'

There are some other things worth eliminating, but you can figure them out,
I'm sure.

	Erik E. Fair	ucbvax!fair	fair@ucbarpa.BERKELEY.EDU