Is AS/400 telnet server uncapable of simultaneously listen to different ports?

Juan Ramón García Martel

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Apr 17, 2001, 7:25:04 AM4/17/01

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A copy screen of WRKSRVTBLE that I have in my AS/400

Opc Service Pport Protocol

netbios-ssn 139 udp
pop3 110 tcp
pop3 110 udp
rmtjournal 3777 tcp
rmtjournal 3777 udp
routed 520 udp
telnet 23 tcp
telnet 23 udp
telnet 2323 tcp
telnet 2323 udp

I have also isued the following:

CALL PGM(QTCP/QTGSRV) PARM(*PORT)

As stated in redbook: V4 TCP/IP for AS/400: More Cool Things Than Ever

But I cannot make telnet server accept connections on port 2323 and it does
only accept connections on port 23

I need my AS/400 to have both ports 23 and 2323 to simultaneously accept
telnet clients ... Is it possible or I have misssed something to make it
work?

Thanks in advance

Paul Nicolay

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Apr 18, 2001, 4:37:46 AM4/18/01

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Hi,

To my knowledge this is not possible.

The only thing that has changed is that the TELNET server is now using the
WRKSRVTBLE after you make the mentioned call, but not that it binds itself
to multiple ports (however I saw something about *BIND as an option to the
call ?)

Kind regards,
Paul
-------------
Juan Ramón García Martel wrote in message
<9bh90u$4eb$1...@diana.bcn.ttd.net>...

Opc Service Pport Protocol

CALL PGM(QTCP/QTGSRV) PARM(*PORT)

Thanks in advance

The contents of this message express only the sender's opinion.
This message does not necessarily reflect the policy or views of
my employer, Merck & Co., Inc. All responsibility for the statements
made in this Usenet posting resides solely and completely with the
sender.

Paul Nicolay

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Apr 18, 2001, 5:05:28 AM4/18/01

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Hi,

From the mentioned Redbook...

"Note that when you add a port for Telnet so that there are duplicate port
numbers,
the Telnet server uses the first entry."

Kind regards,
Paul
------------------------

Juan Ramón García Martel wrote in message
<9bh90u$4eb$1...@diana.bcn.ttd.net>...

Opc Service Pport Protocol

CALL PGM(QTCP/QTGSRV) PARM(*PORT)

Thanks in advance

Juan Ramón García Martel

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Apr 19, 2001, 12:46:33 PM4/19/01

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Thanks for your unswer ....

Any way it seems incredible to me that telnet server cannot listen to
multiple ports .......

Paul Nicolay

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Apr 20, 2001, 4:00:58 AM4/20/01

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Hi Juan,

What benefit would you have from it ? Whether you connect to one port, or
the other... the result will be the same.

Maybe there's a solution with the build IP security... it allows you to do
NAT.

Regards,
Paul

------------------
Juan Ramón García Martel wrote in message

<9bn4jm$mrr$1...@diana.bcn.ttd.net>...

Thanks for your unswer ....

Any way it seems incredible to me that telnet server cannot listen to
multiple ports .......

Juan Ramón García Martel

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Apr 20, 2001, 5:08:17 AM4/20/01

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I am in a condition that due the limitations of a firewall, I need the
23 port for intranet clients and another port, let's say 2323 for
Internet clients thru the firewall. Mainly that's the reason.

Another problem that I have found is that if my AS/400 has two nics with
it's IP addresses or even two or more different IP addresses per NIC, I
cannot bind
different ports-services combination per each IP address.

It would be nice that I could do STRTELNETSVR BIND(XXX.XXX.XXX.XXX:2323)
or simmilar...... so that I would start as many services instances bind as
needed. Perhaps too much for TCP Rochester guys?

Fred A. Kulack

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Apr 20, 2001, 11:26:59 AM4/20/01

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> Perhaps too much for TCP Rochester guys?

I'd suggest skipping the insults from people you're
asking for help from and show some common courtesy.

--
"The stuff we call "software" is not like anything that human society
is used to thinking about. Software is something like a machine, and
something like mathematics, and something like language, and
something like thought, and art, and information...
but software is not in fact any of those other things."
Bruce Sterling - The Hacker Crackdown

Fred A. Kulack - AS/400e Java and Java DB2 access, Jdbc, JTA, etc...
IBM in Rochester, MN (Phone: 507.253.5982 T/L 553-5982)
mailto:kul...@us.ibm.com Personal: mailto:kul...@bresnanlink.net
AOL Instant Messenger Home:FKulack Work:FKulackWrk

Jeffrey Stevens

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Apr 20, 2001, 3:03:02 PM4/20/01

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Well, if you want 2 ports, why not consider using the SSL port 992 for the
Internet and port 23 for the intranet? You need not enable client certificates,
but you might need to have the clients ignore the server certificate.

--
Jeffrey Stevens/Endicott/IBM
TCP/IP (Telnet/TN5250E-RFC2877/WSG/LPD) & iSeries Connect (B2B)
IBM iSeries Software Programming Lab

Jeffrey Stevens

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Apr 20, 2001, 3:05:35 PM4/20/01

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Paul, the *BIND is related to the Old Pascal Telnet server and therefore applies
only to V4R3 and earlier releases, which are now out of service. It had to do
with binding the pascal parts together - something we needed to do for PTF
updates.

Paul Nicolay wrote:
>
> Hi,
>
> To my knowledge this is not possible.
>
> The only thing that has changed is that the TELNET server is now using the
> WRKSRVTBLE after you make the mentioned call, but not that it binds itself
> to multiple ports (however I saw something about *BIND as an option to the
> call ?)
>
> Kind regards,
> Paul

--

Juan Ramón García Martel

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Apr 20, 2001, 4:10:46 PM4/20/01

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Do not get confused, I am insulting no one, just been ironic, allow me to be
so, since I do pay a good fee for OS/400. I just pretend to point out what I
consider a limitation and to propose an improvement.

My very great respect for Rochester proffesionals If some one hurted I do
apologize for my words.

"Fred A. Kulack" <kul...@us.ibm.com> escribió en el mensaje
news:9bpkg3$tpe$1...@news.rchland.ibm.com...

Juan Ramón García Martel

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Apr 20, 2001, 4:15:52 PM4/20/01

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Thanks Jeffrey, it may be a workarround ... but not the good solution I was
looking for. I'll try.

Ken S.

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Apr 20, 2001, 11:14:18 PM4/20/01

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Hi Juan -

On Fri, 20 Apr 2001 10:08:17 +0100, "Juan Ramón García Martel"
<jramonga_...@idecnet.com> wrote:

> I am in a condition that due the limitations of a firewall, I need the
>23 port for intranet clients and another port, let's say 2323 for
>Internet clients thru the firewall. Mainly that's the reason.

If you have to use a special port for external users coming through
the firewall, why don't you use that same port for internal users?

Ken
http://www.ke9nr.org/
Opinions expressed are my own and do not necessarily represent the views of my employer or anyone in their right mind.

Paul Nicolay

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Apr 24, 2001, 4:16:22 AM4/24/01

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Jeffrey,

While I guess it is indeed a router/firewall issue, one must say that the
various TCP/IP servers all have problems with binding. For example, I can't
bind TELNET to a single interface, I can't run multiple DNS servers on
various interfaces (ex. one internal, one external), ... As far as mail is
concerned, this is partially solved for SMTP (but not for POP?).

Regarding the port 23/992... there's another issue with the fact that (to my
knowledge) the TELNET exit program is unable to distinguish on which port
the request came in. For example I would like to write a TELNET exit
program that accepts every IP-address on the SSL port, but only a limited
range on the normal port... which is impossible.

Could you please advice/comment on this ?

Kind regards,
Paul
----------------------
Jeffrey Stevens wrote in message <3AE087E6...@vnet.ibm.com>...

Well, if you want 2 ports, why not consider using the SSL port 992 for the
Internet and port 23 for the intranet? You need not enable client
certificates,
but you might need to have the clients ignore the server certificate.