Hello All.

I found in some old documentation I had laying around in my filebase that I can get VMODEM's telnet engine to answer on a different port. VMODEM's telnet engine's IANA "well-known port name" is "vmotelnet".

Go into C:\MPTN\ETC\SERVICES and remove the "telnet" lines. Add "vmotelnet <port>/tcp" and "vmotelnet <port>/udp" (with <port> being the port number you want), save the file, reboot, and et voila! you can now run your BBS on a different telnet port. I'm using port 2304 and no script kiddies.

Later,
Sean

--- GoldED/2 3.0.1
* Origin: Outpost BBS * bbs.outpostbbs.net:2304 (1:18/200)

From Sean Dennis To All

I found in some old documentation I had laying around in my filebase
that I can get VMODEM's telnet engine to answer on a different port.
VMODEM's telnet engine's IANA "well-known port name" is "vmotelnet".

Go into C:\MPTN\ETC\SERVICES and remove the "telnet" lines. Add
"vmotelnet <port>/tcp" and "vmotelnet <port>/udp" (with <port> being the
port number you want), save the file, reboot, and et voila! you can now
run your BBS on a different telnet port. I'm using port 2304 and no
script kiddies.

Yes. But you can still run only one VMODEM. I played with this feature
once and tried to run one VMODEM/Telnet in port 23 and the other one in
port 32. I couldn't do it. :)

'Tommi

BTW. It is documented in SIO/VMODEM docs. ;-)

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* Origin: smapinntpd/linux @ nntps://news.fidonet.fi (2:221/6.0)

Quoting Sean Dennis to All <=-

I found in some old documentation I had laying around in my filebase
that I can get VMODEM's telnet engine to answer on a different port.
can now run your BBS on a different telnet port. I'm using port 2304
and no script kiddies.

If you had found that 15 years ago I would probably never have left
Max/2. LOL Still happy with my Ezycom setup though which was started
to prove you wrong I seem to remember thouhg I don't remember what I
was trying to prove.

Anyway... good find!

Shawn

... History tends to exaggerate.

--- EzyBlueWave V3.00 01FB001F
* Origin: Tiny's BBS - telnet://tinysbbs.com:3023 (1:229/452)

Hello Shawn.

19 Aug 19 14:51, you wrote to me:

Anyway... good find!

I'm glad I found that. That solution works quite well.

Later,
Sean

--- GoldED/2 3.0.1
* Origin: Outpost BBS * bbs.outpostbbs.net:2304 (1:18/200)

On 2019 Aug 18 17:21:48, you wrote to All:

I found in some old documentation I had laying around in my filebase that

I

can get VMODEM's telnet engine to answer on a different port.

i just wrote about/mentioned this to someone in some echo not long ago... in the past few months, anyway... i didn't recall the details then but knew it was related to editing the services file... i had to do similar some years back... i'm glad you found a solution...

)\/(ark

Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.
... Ya'll come back now ya hear.
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* Origin: (1:3634/12.73)

On 2019 Aug 19 17:05:12, you wrote to Sean Dennis:

Yes. But you can still run only one VMODEM. I played with this feature once and tried to run one VMODEM/Telnet in port 23 and the other one in port 32. I couldn't do it. :)

how do you run more than one vmodem instance anyway? i always had to use a different machine to do that... i don't think vmodem was designed to allow for more than one instance but the 'net was a lot different back then when vmodem brought us its capabilities of putting dial-up BBSes on the 'net...

)\/(ark

Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.
... Anything worth shooting is worth shooting twice. Ammo is cheap.
---
* Origin: (1:3634/12.73)

Hallo mark!

20.08.2019 08:23, mark lewis schrieb an Tommi Koivula:

how do you run more than one vmodem instance anyway?

Currently my vmodem and telnet ports are down, but usually I have 8 telnet ports running, with one instance of vmodem(2k).
But there is one big bug with vmodem; if the clientsession isn't closed properly, vmodem hangs up the whole computer without a trap.

i always had to use a different machine to do that...

Did you remember why?

)\/(ark

Bye/2 Torsten

... MAILBOX01 on OS2: up 0d 18h 15m load: 38 proc, 131 threads (tbupv1.1)
--- GoldED+ 1.1.5-19
* Origin: DatenBahn BBS Hamburg (2:240/5832)

Hi Mark,

i just wrote about/mentioned this to someone in some
echo not long ago... in the past few months, anyway...
i didn't recall the details then but knew it was
related to editing the services file... i had to do
similar some years back... i'm glad you found a
solution...

Yeah, I'm glad too. So far, so good. No script kiddies.

I've even put my BBS up for connecting via my website so you don't have to have a telnet client to get in but you do need a modern browser.

Now to continue the work on the BBS. I have about 40 shareware CDs I want to add in. Just because I can, mind you; no other reason.

Later,
Sean


--- Maximus/2 3.01
* Origin: Outpost BBS * bbs.outpostbbs.net:2304 (1:18/200)

Hello mark!

20 Aug 19 08:23, you wrote to Tommi Koivula:

Yes. But you can still run only one VMODEM. I played with this
feature once and tried to run one VMODEM/Telnet in port 23 and
the other one in port 32. I couldn't do it. :)

how do you run more than one vmodem instance anyway? i always had to
use a different machine to do that... i don't think vmodem was
designed to allow for more than one instance but the 'net was a lot different back then when vmodem brought us its capabilities of putting dial-up BBSes on the 'net...

You can only run one instance of VMODEM on any given OS/2 machine, but it can handle multiple virtual ports. My OS/2 system currently has 3 nodes running; 1 real modem and 2 virtual modems, both of which can answer Telnet on port 23 and VMODEM on port 3141. My firewall accepts inbound telnet on port 2023, and forwards it to port 23 on the OS/2 machine.

Andrew

--- GoldED+/LNX 1.1.5-b20180707
* Origin: Phoenix BBS * phoenix.bnbbbs.net (1:320/219)

On 20.08.2019 12:23, mark lewis -> Tommi Koivula :

On 2019 Aug 19 17:05:12, you wrote to Sean Dennis:

TK> Yes. But you can still run only one VMODEM. I played with this feature
TK> once and tried to run one VMODEM/Telnet in port 23 and the other one in
TK> port 32. I couldn't do it. :)

how do you run more than one vmodem instance anyway?

I can't. Didn't I just tell you that. :)

'Tommi

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* Origin: nntp://rbb.fidonet.fi - Lake Ylo - Finland (2:221/360)

On 20.08.2019 17:07, Torsten Bamberg -> mark lewis wrote:

Currently my vmodem and telnet ports are down, but usually I have 8
telnet ports running, with one instance of vmodem(2k).

8 different TCP ports? My Vmodem of SIO 1.60 has 16 "ports", but listening only one TCP port. Which is 23 BTW. And that port is not exposed to the internet, my router forwards external port 32 to port 23 at OS/2 computer.

But there is one big bug with vmodem; if the clientsession isn't
closed properly, vmodem hangs up the whole computer without a trap.

Oh?

'Tommi

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* Origin: nntp://rbb.fidonet.fi - Lake Ylo - Finland (2:221/360)

On 21.08.2019 5:34, Andrew Leary -> mark lewis :

My OS/2 system currently has 3 nodes running; 1 real modem and 2
virtual modems, both of which can answer Telnet on port 23 and VMODEM
on port 3141.

What I was trying to do, was to make two different telnet servers in two different tcp ports: run Xenia Mailer in 23/tcp and FrontDoor in 2030/tcp. Now I have both these mailers running in port 23/tcp, the first telnet session is routed to Frontdoor, the next ones to Xenias. ;)

Why? Just for fun. :D

'Tommi

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* Origin: nntp://rbb.fidonet.fi - Lake Ylo - Finland (2:221/360)

Hallo Tommi!

21.08.2019 20:01, Tommi Koivula schrieb an Torsten Bamberg:

Currently my vmodem and telnet ports are down, but usually I have 8
telnet ports running, with one instance of vmodem(2k).

8 different TCP ports?

I meant telnet-sessions simultanously. Of course only port 23 is attached.

My Vmodem of SIO 1.60 has 16 "ports", but listening only one TCP port.

I'm using sio2k. sio2k supports 256 'sessions', witch can be telnet, com-ports or com emulated capi-devices. I've got one big problem with sio2k, I can't register it any more.

Which is 23 BTW. And that port is not exposed to the internet, my
router forwards external port 32 to port 23 at OS/2 computer.

Ahm, i've got a special security configuration, not only because of the 'unclosed session bug' from sio2k


cable -->-- cable-router -->-- Router 1 Firewall 1
dsl -->-- dsl-modem -->-- BSD-Router -->-- BSDFirewall
| | |--->--- DMZ
| |
| |--->--- LAN
|
-> Firewall 2
| with fail2ban BSD
|
RexxLogScripting ^ |
| Telnet on
-- Mailbox 01

Security by obscurity. ;-)

But there is one big bug with vmodem; if the clientsession isn't
closed properly, vmodem hangs up the whole computer without a trap.

Oh?

Jap. If more than 256 connections are opend, and not properly closed, sio2k does hang up the system.

'Tommi

Bye/2 Torsten

... MAILBOX01 on OS2: up 1d 18h 29m load: 35 proc, 129 threads (tbupv1.1)
--- GoldED+ 1.1.5-19
* Origin: DatenBahn BBS Hamburg (2:240/5832)