[comp.sys.mac] Remote access to LocalTalk -- Advice wanted

robt@mummy.unsw.oz (Rob_Trevor) (03/21/90)

I would like to be able to dial up my office network from home in order to:

        * telnet into various machines on the campus network (say with NCSA
          Telnet, or using the MacTCP/IP drivers etc)

        * remotely start up numerical/time intensive programs on my office Mac
          (say with Timbuktu)

I was wondering whether one of the NetModem products (eg Shiva's) would allow
me to do both of these.  My crude understanding is that it makes my remote Mac
think that its directly connected to the LocalTalk network.  Will NCSA Telnet,
the MacTCP/IP drives (for the NetNews reader say) and Timbuktu all accept that
the remote Mac is really 'on' LocalTalk?  

That seems to be the key question.  Once I can get the LocalTalk connection
I'm right because it goes through a Webster box (running KIP) onto the campus
ethernet.

I would greatly appreciate any advice, especially from those who have
something similar running.  BTW, I know that Timbuktu Remote will allow me to
do this provided I run the news reader etc on my office mac (which is on the
network).  But when I'm working at home I'd prefer my office Mac to be number
crunching while my news/mail etc load is on my remote machine.

Thanks in advance.  Post or email replies to me at following address.

****************************************************************************

Rob Trevor                                     robt@mummy.agsm.unsw.oz.au
Associate Professor
Australian Graduate School of Management           +61 2 662-0274 (voice)
University of New South Wales                      +61 2 662-2451 (fax)
Kensington, NSW, Australia, 2033

****************************************************************************

sidlives@mck-csc.UUCP (David Rho) (03/22/90)

In article <594@usage.csd.unsw.oz> robt@mummy.unsw.oz (Rob_Trevor) writes:
>
>I would like to be able to dial up my office network from home in order to:
>
>       * telnet into various machines on the campus network (say with NCSA
>         Telnet, or using the MacTCP/IP drivers etc)
>
>       * remotely start up numerical/time intensive programs on my office Mac
>         (say with Timbuktu)
>
>I was wondering whether one of the NetModem products (eg Shiva's) would allow
>me to do both of these.  My crude understanding is that it makes my remote Mac
>think that its directly connected to the LocalTalk network.  Will NCSA Telnet,
>the MacTCP/IP drives (for the NetNews reader say) and Timbuktu all accept that
>the remote Mac is really 'on' LocalTalk?  
>
[Stuff deleted]

I have tried to use NCSA Telnet MacTCP 2.3 over a 2400 bps modem
to a Shiva 2400 bps Netmodem.  I did not work.  On the other hand,
standard NCSA Telnet did work.  I believe MacTCP will not work
properly over a 2400 bps line because of timing constraints.  If
you do wish to use a Netmodem to dial in to an Appletalk network,
don't think of using a 1200 baud modem.  It doesn't work reliably
(Appletalk time outs will let it work well).  I don't know if
MacTCP will work over a 9600 bps connection.  We don't have a
9600 bps Netmodem, yet.

-------------
Disclaimer: You know what a disclaimer is supposed to say,
            so I won't bother to say it.
David Rho
sidlives%mck-csc@eddie.mit.edu
sidlives@athena.mit.edu (much more reliable mail connection)

tom@wcc.oz (Tom Evans) (03/23/90)

In article <594@usage.csd.unsw.oz>, robt@mummy.unsw.oz (Rob_Trevor) writes:
> 
> I would like to be able to dial up my office network from home in order to:
> 
>         * telnet into various machines on the campus network (say with NCSA
>           Telnet, or using the MacTCP/IP drivers etc)

You could just log in with MacTerminal or Kermit, but I assume you want
simultaneous multiple Telnet login sessions and concurrent AppleTalk
services. Running a terminal session inside TCP/IP inside AppleTalk
inside an async protocol burns bandwidth though.
 
>         * remotely start up numerical/time intensive programs on my office Mac
>           (say with Timbuktu)
> 
> ...
> Once I can get the LocalTalk connection
> I'm right because it goes through a Webster box (running KIP) onto the campus
> ethernet.

Funny you should ask. On the multigate@munnari newsletter the following has
just been posted:

> From: djh@murtoa.cs.mu.oz
> 
> I am pleased to announce the release of the following Multigate software.
> You can obtain these files via anonymous ftp (use BINARY mode) or ACSnet
> fetchfile from munnari.OZ.AU
>
> ... (various files and then)
> 
> Async AppleTalk for UNIX/CAP v 1.2	(multigate/async.atalk.1.2.shar.Z)
> 	This package allows remote access to AppleTalk Networks via UNIX
> 	host serial lines. Use AppleShare servers and Printers from home!

Many Universities have racks of modems and dial-in lines already
connected to machines. What better than to use existing dial-in
hardware to connect your Mac to a Unix host, and then have some
magic occur that connects you directly to your campus AppleTalk network?

This is what Async AppleTalk is all about. You connect to your Unix
machine the usual way and run the "async" program. This has a private
pathway into the MultiGate which acts as your router. You (and other
Macs logged in) appear to the network to be on a separate AppleTalk
network (with your own network number and zone if you wish). You can
run applications (5 minutes to launch Disinfectant at 9600 baud),
mail, print, get files etc.

Currently this setup won't let you run NCSA as you can't get an IP
address allocated down the async line. Maybe later.

Async AppleTalk requires the CAP libraries to be present on the Unix
host.
			    ---------
Tom Evans  tom@wcc.oz.au        |
Webster Computer Corp P/L       | "The concept of my
1270 Ferntree Gully Rd          |  existence is an
Scoresby VIC 3179               |  approximation"
Australia                       |
61-3-764-1100  FAX ...764-1179  |      D. Conway

martyl@bucket.UUCP (Marty Lee) (03/27/90)

sidlives@mck-csc.UUCP (David Rho) writes:

>In article <594@usage.csd.unsw.oz> robt@mummy.unsw.oz (Rob_Trevor) writes:
>>
>>I would like to be able to dial up my office network from home in order to:
>>
>>       * telnet into various machines on the campus network (say with NCSA
>>         Telnet, or using the MacTCP/IP drivers etc)
>>
>>       * remotely start up numerical/time intensive programs on my office Mac
>>         (say with Timbuktu)
>>
>[Stuff deleted]

We've been usingg Liaison and Microcom V.32 9600 bps MNP Class 9 modems for
about a year now.  Just about anything that works on an Appletalk network
at our office works over the dialup with Liaison.  We even use Timbuktu
(regular not remote) to support people and troubleshoot with people
in remote cities.  TOPS works great too....taking into account that the
speed is reduced to 9600 bps.

By the way we have noticed that several long distance dialups using
MCI don't work at 9600 bps.  AT&T seems to always work....

Anybody have any comments?


tektronix.TEK.COM!tessi!bucket!martyl  (Marty Lee)
 (Keep trying.....you'll find a path!!!)

holst@rimfaxe.diku.dk (Bo Holst-Christensen) (03/29/90)

In article <422@mck-csc.UUCP> sidlives@athena.mit.edu (David Rho) writes:
>I have tried to use NCSA Telnet MacTCP 2.3 over a 2400 bps modem
>to a Shiva 2400 bps Netmodem.  I did not work.  On the other hand,

   I have also tried using NCSA Telnet MacTCP 2.3 (actually the BYU version)
over modem to a Shiva 2400 bps Netmodem, but I had no problems with the
software. I have used both a 1200 and a 2400 bps modem and both worked nicely.
   If a 1200 bps modem is used, it will take forever to do anything usefull,
but I had no problems in getting it to work.

   Bo Holst-Christensen
   Dept. of Computer Science
   University of Copenhagen
   Universitetsparken 1
   DK-2100 Koebenhavn OE
   Denmark

   email: holst@diku.dk