Path: utzoo!attcan!uunet!husc6!uwvax!dogie!uwmcsd1!ig!agate!ucbvax!CUNYVM.CUNY.EDU!T_WADE%ccvax.ucd.ie
From: T_WADE%ccvax.ucd.ie@CUNYVM.CUNY.EDU ("Tom Wade, Systems")
Newsgroups: comp.os.vms
Subject: Preventing Chattering terminal lines.
Message-ID: <8806211505.AA03232@ucbvax.Berkeley.EDU>
Date: 15 Jun 88 11:11:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 30

If you have a terminal line connected to another machine which
you only use for VAX originated traffic (e.g. outgoing Kermit calls)
then you can disable the line for incoming login attempts by
SET TERMINAL/NOTYPEAHEAD (this prevents chattering whereby each node
fires "Login Please" and "Authorization failure" messages at each other).

This however will impact on your Kermit.  A better method is to set
the line

        $ Set Terminal TXB3 /secure /permanent

This means that a break signal is required to initiate a login on
that line, anything else is ignored. Of course, this won't work if
the connected machine sends a break at any time your Kermit is running
(a break causes any process with a channel open to the line to be terminated
and the loginout process to start).  Outgoing break signals from your
Kermit are all right.  I use the above for a connection to our telex
interface to prevent chattering when the telex driver is not running.

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Tom Wade                      Heanet:   T-Wade@ccvax.ucd.ie
Systems Programmer            Ean:      t-wade@ccvax.ucd.irl
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