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Text File
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1992-06-23
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13KB
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364 lines
UK AMPRNET TCP/IP Newsletter
Mike Chace - G6DHU
Issue 1 Volume 1 - January 1991
1. Introduction
Hello and welcome to this first issue of the TCP/IP
Newsletter for the UK AMPRNET community.
You've probably realised the size of the hosts.net file
these days! But then you probably realised how few of those
stations allocated addresses are on air for some time - let
alone 24 hours. I hope to fulfill the following aims in
starting the newsletter.
Disseminate information on UK AMPRNET topology
Increase connectivity of the UK AMPRNET
Announcements of new software releases
Operating experiences
Software bug fixes and enhancements
Information on how to obtain software and hardware
News on address allocations
Beginner's help - Problem Clinic and tutorial material
General news and discussion
I hope that the newsletter will be of interest to those
already using TCP/IP and those who are interested in making
the move to Amateur Packet Radio TCP/IP.
Of course, to do all these things requires time and I
propose to produce the newsletter on a bi-monthly basis.
Hopefully, that should also allow enough time to gather the
information and articles which will of course come flooding
in !?
Distribution
As one of the principle aims of the newsletter will be to
increase the connectivity between IP clusters - I'm hoping
to distribute as much of the text as possible via SMTP.
Newcomers to the mode could also receive a copy of the
current newsletter on being allocated their address.
Some of you reading this will be priviledged enough to be
contactable on one of the larger computer nets eg JANET,
Internet. If your local subnet is isolated then please tell
me your e-mail address and you can act as a local
distributor via e-mail. For the time being I will distibute
the newsletter via the UK NTS BBS network.
At the moment I'm using the well known Unix 'nroff' text
formatter (ported to the Atari ST) to produce the
newsletter. It provides a neat presentation with the added
bonus that pretty hard-copy is also available. The
newsletter will (initially) be distributed as nroff output.
If there is enough interest in receiving the nroff source
then I could mail this too.
2. UK AMPRNET Topology
What can you do to help ?
Currently the UK AMPRNET seems to be a set of fairly
distinct and localised IP clusters. With Phil Karn's
NET/NOS programs now some years old and stable perhaps we
should be thinking of using the power inherent in TCP/IP and
begin to link these clusters.
Most of us are fortunate in having a well-connected NET/ROM
network close at hand. Granted, it's probably (very ?) busy
at times but we need to use the network as it stands. In
order to know more about how to set up these links we need
to know more about each others local NET/ROM connectivity
and I intend this newsletter to provide that information.
In doing so I will need your help. As an example of the
sort of details I expect, I have included a NET/ROM topology
of my local area.
I'm not suggesting you copy the format but I can't think of
a better way in which to present it.
Topology of the Bath/Bristol IP Cluster (Subnet 20)
Bristol Bath
WRW:GB7FC---------AQUSUL:GB7UX-2 ----\
| | \
| | \
+ TCPWRW:G4WRW-4 + BATH:G6DHU-5 TCPOTJ:G4OTJ +
|
|
TCPJQD:G4JQD +
+ Indicates 24hr (or near!) station.
The 144.650 Trunk Network nodes are GB7FC and GB7UX-2
Additional Information
Local Stations - Subnet 20 are :
G4WRW - Dave - 44.131.20.2 - G1EMM NOS
G6DHU - Mike - 44.131.20.3 - PE1CHL NET
G4OTJ - John - 44.131.20.4 - G1EMM NOS
G4JQD - Chris - 44.131.20.5 - G1EMM NOS
Connectivity
All IP activity is across NET/ROM and all 2m based. G4WRW-4
and G6DHU-5 use 144.650 with G4OTJ being a 144.650/675
gateway.
Planned
We hope to link our cluster to G1WKK in Basingstoke via a
rather long (and precarious) NET/ROM route which has been
proven to work during recent tests.
A link to G0BSX in Sheffield from G4WRW may also be possible
hence linking London to Sheffield via Bath.
A link to Plymouth will be possible when a 23cms link across
the Mendips from Bristol/Bath is established. (Planned by
SWAX (North) Group)
I hope that helps as a guide to the sort of information
required. Of course, just a verbal decription would be
equally appropriate - assuming that interested readers can
draw a topology themselves.
3. Software
PE1CHL NET Version 900710
This IP software is a must if you are an Atari ST
user/owner. A version is also available for the PC clones
(80xxx) and for XENIX boxes.
A much enhanced version of the last of the NETs it features
extras such as ;
AX.25 Mailbox
NET/ROM clone (with full user level access)
Conference Bridge (Chat Node)
KA-Node clone
MHeard server
TNC2 emulator
Multi-channel KISS (eg KPC4) support
Remote command processor
Remote Login client/server
The AX.25 mailbox is capable of forwarding and
reverse-forwarding. W0RLI type scripts can be written to
deliver mail to PMSs and NTS Mailboxes which allows you to
prepare mail for locals still on L2 in the comfort of BM
etc.
The NET/ROM node can be configured to act as an IP
interlinking gateway by recognising a programmed node alias
(eg #TCPIP). The node has full user level functionality
and can be crossbanded with nothing more difficult than an
extra line in the autoexec.net file. In fact, all servers
can be configured in the same way to be accessible from any
interface/band.
The TNC2 emulator is an interesting server which allows
users to connect to the system and effectively spawn a
process running the TAPR TNC2 1.1.7 code. Not much use as
such but it comes into it's own when connecting to a BBS on
the machine or running KISS on top of the already running
NET program!
The remote login facility allows password protected access
to a command interpreter which effectively puts the remote
station at the keyboard of the local station. A UDP
'remote' server is also implemented as in KA9Q NOS. A
software watchdog circuit is also included which will reboot
the machine and run NET in the case of either a NET or shell
hang/crash. These features, together with the great
stability of this program, make it ideal for a
multi-function node for AX.25/NET/ROM and TCP/IP users.
PE1CHL NET also has software support for the OptoSCC card
(see PA0HZPs paper in the 8th CNC Proceedings). This
interfaces to the ST midi port and allows TNC-less
operation, on upto 8 multi-frequency/data-rate channels.
Availability
The PE1CHL software is available from (Paul) G1PLT (@ GB3XP)
who also maintains and enhances the program, or myself.
MacNET
I have the latest version of Doug Thom's (N6OYU) enhanced
version of NET for the Apple Macintosh series of computers.
It includes NET/ROM support, the standard W9NK AX.25 mailbox
and split-screen trace. It can also be configured to access
a remote machine/ file server via the Appletalk
networking/bus system.
Since starting this newsletter, I hear that Doug has now
ported NOS to the Mac and this is now being distributed. I
hope to bring you further details in a later issue.
G0BSX W0RLI <-> SMTP Server
Contact Peter (G0BSX@GB7BSX) or myself for the latest
sources and executables for this server for the IBM-PC. The
system allows direct mail forwarding from SMTP to W0RLI and
vice-versa.
4. Beginner's Help
Beginners Documentation Package.
This package is distributed by myself on a 3.5 inch floppy
in Atari ST, IBM-PC or Macintosh formats. The package
currently contains text versions of the following documents
;
The NOS User Reference - Phil Karn (KA9Q)
The NET TCP/IP Beginners Guide - Gary Ford (N6GF)
TCP/IP and NET/ROM Tutorial - Dan Frank (W9NK)
The KISS TNC Standard - Phil Karn et al.
Introduction to TCP/IP - Charles Hedricks - Rutgers
University
I have suggested to Dave (G4CLI), our Address Coordinator,
that we can offer this package to newcomers when they
receive their address allocation.
5. Newcomers Operating Experience
I asked one of the local IP operators, John (G4OTJ), to give
me a quick run down on what he had done in switching to
NOS.....
Packet radio had become boring. I was seriously considering
giving it up and concentrating on ATV again but then I heard
about TCP/IP. I obtained a copy of NET which was about three
years old and as I soon discovered full of bugs. Anyway I
got it going and with loads of help from Mike G6DHU managed
to send some mail to Chris G4JQD (who I persuaded to engage
KISS mode for a while),Mike and Dave G4WRW.
I was soon supplied with a recent version of NOS (April
90ish) which enabled me to swap files a FTP didn't work on
the old version of NET. I have since added a second rig and
TNC and have a gateway operative between 144.650 and
144.675.
I have modified my computer (an Opus PC2 XT clone) to allow
me to switch off the power to the hard disks and I normally
leave it running just on the B: drive, a 720k floppy. There
isn't a great deal of activity in the area but hopefully
links will be made or found to other areas and at that point
the interest will increase enormously. I have nearly
established a TCP/IP station at the radio club at work.
G4HTV-5 has been seen on 144.65 but until I finish building
the PSU for the rig it will be off.
I have just bought a pcb for a 9600 baud modem and hope to
have a port operating on another frequency, probably in 2
metres, using that mode.
One thing is certain, TCP/IP isn't boring. It is going to
take some time for me to even find all the commands let
alone understand them!
John (G4OTJ)
6. Help for new users of IP
How many messages have you seen on the mailbox network these
days asking questions such as 'What is TCP/IP' or 'HELP! I
can't get it going' ?
It seems to me that a great number of stations have the
hardware available to run TCP/IP - let's not forget that NET
or NOS now run on PCs, Atari ST, Amiga and the Macintosh
(Any news about the Archimedes port ?!). I'm not really sure
what spurs most people into trying TCP/IP but I'm quite sure
that many people are in dire need of some education and help
as they start to use the NET or NOS software. The TCP/IP
Beginner's Guide by Gary Ford (see above) makes a pretty
good attempt at the sort of document we need to support the
software but even that only goes as far as making
connections with AX.25.
Perhaps someone reading this has written, or is in the
process of writing a comprehensive user guide for NET or
NOS. If so, then please tell me. I'm sure that this
newsletter would be a good forum for such discussions. Let
me know what YOU think is needed. I am quite sure that a
good manual will greatly increase the numbers on IP beyond
those that pass the initial stages of setting the gear up
and then find difficulty when having to route across NET/ROM
to reach another IP node.
7. Newsflash !
A US/Canadian packet group have been experimenting with a
new 9600bps modem design based on the Yamaha 7109 FAX chip.
What's new ? Well, the modem works without modification to
your radio equipment. It's early days but a number of
popular radios have been tested with the modem and the
results seem encouraging. Two main stations have undergone
extensive tests with 2m handies using the modem for AX.25
mailbox access and FTP.
More news on this in a later issue.
8. 221 Closing....
I hope you found this first issue informative and support
it's aims. Please send suggestions and articles for
inclusion to me at the following addresses ;
84 Frankland Close
Bath
Avon
BA1 4EL
or via e-mail (mikec@praxis.co.uk), AMPRNET g6dhu.ampr.org
[44.131.20.3] or AX.25 NTS BBS (G6DHU@GB7IMB).
I can accept material on 720k IBM/MS-DOS and Atari ST 3 1/2
inch format disks and if you want them back PLEASE include
the return postage.
All material greatfully received!
73, Mike