RE: Telnet Server

["Fritz Hayes" <fhayes@xxxxxxxxxxxxx>]

Hey Shannon,

Here's a crazy thought:  Maybe you can use the AS/400s Network Address
Translation (NAT) to map telnet requests from a known network (say
172.16.2.0) to use a different IP Port for telnet sessions?!  Does this
fit what you are trying to do?

Best Regards

Fritz Hayes
Atwater Associates
503-636-5914

> -----Original Message-----
> From: midrange-l-admin@midrange.com
[mailto:midrange-l-admin@midrange.com]
> On Behalf Of Shannon O'Donnell
> Sent: Friday, August 31, 2001 7:32 AM
> To: midrange-l@midrange.com
> Subject: Re: Telnet Server
>
> Thanks Simon!
>
> That's a lot more information than I had when I started down this
road!
>
> I may contact IBM about this, but since I need a solution to a problem
> immediately, it won't be anytime soon. I'll be spending my time now
> looking
> for an alternate way of doing what I need to do.
>
> Thanks for the info!
>
> Shannon O'Donnell
> ----- Original Message -----
> From: "Simon Coulter" <shc@flybynight.com.au>
> To: <midrange-l@midrange.com>
> Sent: Thursday, August 30, 2001 11:37 PM
> Subject: Re: Telnet Server
>
>
> > M
> > Hello Shannon,
> >
> > I tested the information I sent earlier on VRM440 and found that it
no
> longer
> > works.  As part of the architectural change to Telnet that occured
at
> 440
> the
> > QTGSTART program (which is what gets called by STRTCPSVR *TELNET)
gets
> to
> see
> > if TELNET is currently active.  It is not doing that by checking the
> port
> > however I haven't bothered trying to find out what it does check.
> QTGSTART
> > sends TCP1A04 - "Telnet currently active" if it finds Telnet is
already
> > running.
> >
> > The nett result is that on 440 and later releases only one instance
of
> TELNET
> > can be active.  That single instance can (and does) listen on
multiple
> ports
> > but they haven't written it to handle more than one port per service
> name.
> > They probably just use getservbyname() which returns the first entry
> with
> the
> > requested name and protocol from the SERVICES table.  That approach
is
> > reasonable and consistent with most TCP applications.  You could
raise a
> DCR
> > and request they use getservent() and then they could process all
the
> entries
> > in the SERVICES table.  I notice that TELNET uses accept() rather
than
> the
> more
> > useful select() so they would have a bit of work to implement
multiple
> servers.
> >
> > Regards,
> > Simon Coulter.
> >
> > <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
> > <> FlyByNight Software         AS/400 Technical Specialists       <>
> > <> Eclipse the competition - run your business on an IBM AS/400.  <>
> > <>                                                                <>
> > <> Phone: +61 3 9419 0175   Mobile: +61 0411 091 400        /"\   <>
> > <> Fax:   +61 3 9419 0175   mailto: shc@flybynight.com.au   \ /   <>
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