Great Circle Associates List-Managers
(April 1994)
 

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Subject: Re: list membership security
From: David Casti <disc @ vector . casti . com>
Date: Mon, 25 Apr 1994 06:47:58 -0400 (EDT)
To: James Cook <jcook @ netcom . com>
Cc: list-managers @ GreatCircle . COM
In-reply-to: <Pine.3.89.9404241859.A22674-0100000@netcom5>

> Ah ......I may out of luck. Also, As Sharon points out, this may disable 
> the who command for every list manager at a site, correct? Some list 
> managers w/ Majordomo may desire to leave "who" activated.

This change will affect every list managed by that particular copy of 
majordomo, yes.

> On another note, I've heard that even disabling "who" will not prevent 
> certain other methods of even non list members from obtaining alist of 
> users. Something about sendmail manipulation......

Sure, but there are also ways to defeat this.  Turn off EXPN and VRFY in 
sendmail, for example.

David.



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