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Path: utzoo!linus!decvax!decwrl!dec-rhea!dec-jon!moroney
From: moroney@jon.DEC (Mike Moroney)
Newsgroups: net.crypt
Subject: Re: foiling password crackers
Message-ID: <1075@decwrl.DEC.COM>
Date: Wed, 12-Feb-86 00:40:44 EST
Article-I.D.: decwrl.1075
Posted: Wed Feb 12 00:40:44 1986
Date-Received: Thu, 13-Feb-86 19:23:30 EST
Sender: daemon@decwrl.DEC.COM
Organization: Digital Equipment Corporation
Lines: 19


>Turning off the ability to successfully login on a dialup line (even
>only for awhile) seems like a good way to allow password crackers
>to tangle up enough dialup lines to make it hard for legit users
>to log in.  There are people who would just love doing things like
>that just to cause trouble.

With many phone systems they can do this anyway, the called line is NOT
released until the CALLER hangs up.  All such a person needs to do on such
a system is call the modem and leave his phone off the hook.  If you are
curious if your phone system is like this, try the following:
1) Call a friend.
2) Have friend hang up.  You do not hang up.
3) Have friend pick up his receiver again.
4) If you are still connected, you have this type phone system.

This will not work with long distance.

-Mike Moroney