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STing Nullmodem Network HOWTO

This is a small HOWTO for connecting an Atari ST and an Atari Falcon to your network via STing, MIDI and Nullmodem.

It was original written and maintained by Alain Gaymard but the website is not available anymore.

I (Simon Sunnyboy) use this without MIDI currently and it works pretty good though not fast. Some tricks I learned include:

use MODEM 1 instead of MODEM 2
use real TAB spacing for the ROUTE.TAB (do NOT use 7UP to edit it!)
boot the Atari Falcon first and launch the PPP sequence on the PC end afterwards
the PPP daemon on the Linux end will die if you reset the Falcon so you have to restart it
aFTP (STiK version) doesn't work properly for uploads
115200 Baud seem unstable for my setup (HSMODEM included) and doesn't feel much faster than 57600
I currently have no ST connected via MIDI and therefor I have no route from the PC to the ST.
Just enter a proper Nameserver into STing and you are fully connected. I use the one of my university network.

On the Linux end my script looks like this for Ubuntu 6.06LTS. (Take note it doesn't use ipfwadm anymore!):

#!/bin/sh
#
pppd crtscts lock noauth 192.168.0.1:192.168.0.2 /dev/ttyS0 57600 &
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
sysctl -w net/ipv4/ip_forward

In my setup the PC has the IP 192.168.0.1 and the Falcon 192.168.0.2.

Alain Gaymard's text

I also have an Atari ST and a Falcon. They are connected to the PC like in the picture:

The three computer can have access to internet. Each computer can also run a Web server!
I use PPP on all machines and STinG on Atari. The last version of STinG [1.26] is a the following address: http://www.ettnet.se/~dlanor/sting/html/file.htm.

Configuration of the ST
Configuration of the Falcon
Configuration of the PC

Programs on the ST and configuration:

In the AUTO folder:

DRVIN.PRG : absolutely necessary for HSMODEM

MIDI.PRG: absolulety necessary to use MIDI port as serial port

STING.PRG: the TCP/IP layer

STinG setup:
Of course you need a control panel and CPX for STinG

Set up of MIDI port:
File ROUTE.TAB:
192.168.0.0 255.255.0.0 Midi 192.168.100.2

Programs on the Falcon and configuration:

In the AUTO folder:

DRVIN.PRG: absolutely necessary for HSMODEM /li>
MIDI.PRG: absolulety necessary to use MIDI port as serial port

SCC.PRG: to use the serial port at high speed

STING.PRG: the TCP/IP layer

STinG setup:
Of course you need a control panel and CPX for STinG

Set up of MIDI port:

Set up of serial port:
File ROUTE.TAB
192.168.100.0 255.255.100.0 Midi 192.168.100.3
192.168.1.0 255.255.1.0 Modem 1 192.168.1.1
0.0.0.0 0.0.0.0 Modem 1 192.168.1.1

The PC is running linux. Just type in:

pppd crtscts lock 192.168.1.1:192.168.1.2 /dev/ttyS1 115200

add the route to the ST with the Falcon as a gateway

route add 192.168.100.3 gw 192.168.1.2 ppp0

and set up the Network Address Translation

ipfwadm -F -p deny
ipfwadm -F -a m -S 192.168.0.0/16 -D 0.0.0.0/0

That's all you need to do!