Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!apple!amdahl!shs
From: shs@uts.amdahl.com (Steve Schoettler)
Newsgroups: comp.sources.d
Subject: Re: getty/login for callback
Keywords: tip getty login
Message-ID: <18yLb6a0ib1010aFV6Y@amdahl.uts.amdahl.com>
Date: 12 Apr 89 20:38:06 GMT
References: <180001@mechp10.UUCP> <13853@rpp386.Dallas.TX.US> <797@twwells.uucp> <14U6Pf88Sj1010WE=r6@amdahl.uts.amdahl.com> <623@peritek.UUCP>
Reply-To: shs@amdahl.uts.amdahl.com (Steve Schoettler)
Distribution: usa
Organization: Amdahl Corporation, Sunnyvale CA
Lines: 44

In article <623@peritek.UUCP> dig@peritek.UUCP (Dave Gotwisner) writes:
>In article <14U6Pf88Sj1010WE=r6@amdahl.uts.amdahl.com>, shs@uts.amdahl.com (Steve Schoettler) writes:
># 
># I wrote something like this by modifying the standard unix tip program.
># This allowed taking advantage of a standard text file format for storing phone
># numbers, baud rates, etc.  This also allows operation under a variety of
># modems (hayes and ventel).
># The program was invoked with "ntip myname", where there was an entry for
># myname in /etc/remote.
># 
># All you have to do is find the place where tip makes the connection,
># and fork a shell, setting stdin and stdout to the serial port.  I
># think the command I actually used inside my exec was "rlogin localhost",
># because I had trouble creating a getty on the dial out line.  You can
># set stdin and stdout of the shell with the dup() command.
>
>This works fine, if you are calling from a computer.  If I have a terminal
>at home (not a PC or workstation), I cannot run tip, I need some secure
>program running on the UNIX box that I am calling to prevent illegal logins.
>-- 
>------------------------------------------------------------------------------
>Dave Gotwisner					UUCP:  ...!unisoft!peritek!dig
>Peritek Corporation				       ...!vsi1!peritek!dig
>5550 Redwood Road
>Oakland, CA 94619				Phone: 1-415-531-6500


Sorry, I guess I didn't explain it well enough.  The goal is to save the
user's personal phone bills.  Here's what happens:
	user calls the computer. (can be from a terminal + modem or
             home computer + modem)
        user logs into the computer and runs ntip.
        then user logs off, hangs up, sets the modem on auto-answer,
        and the computer calls him up and forks a shell out the computer's
             serial port, which the user sees on his terminal, just as
             getty/login did when the user called the computer.

Steve
-- 

        Steve Schoettler
        shs@uts.amdahl.com
        {sun,decwrl,pyramid,ames,uunet}!amdahl!shs
        Amdahl Corp., M/S 213, 1250 E. Arques Ave, Sunnyvale, CA 94088