Re: Telnet Server -- MIDRANGE-L

Hey! Now that idea has possibilities! I hadn't even considered that!

I'm going to look into this.

I'll keep you posted!

Shannon O'Donnell

----- Original Message -----
From: "Fritz Hayes" <fhayes@spiritone.com>
To: <midrange-l@midrange.com>
Sent: Friday, August 31, 2001 11:11 AM
Subject: RE: Telnet Server


> 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   \ /   <>
> > > <>                                                           X    <>
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