Johnny, Well, I have been doing some Googling and I now see what your - and Terry's - system is all about. It appears that I was correct in guessing that "port 3270" enables you to be pretending to be a local non-SNA channel-attached 3270 display device represented in VTAM by a LOCAL statement necessarily using a USS table with USS message text consisting of the 3270 data stream. It seems that FLEX-ES provides a TELNET 3270 server - what Terry calls the "Telnet Listener" - which provides the appearance of this local non-SNA channel-attached 3270 display device to the supported operating system, in this case z/OS.
However I still haven't been able to discover why "port 23" seems to get straight through to the CS IP TELNET 3270 server. Given the complexity of the environment - with more smoke and mirrors than the seediest of nightclubs - my assumption in an earlier post that port 23 would take you through to the CS IP TELNET 3270 server was rather rash! I haven't succeeded in finding out how you route between the various operating system types and instances that may be running on your laptop from the x3270 instances that you are starting up. Is there some table where ports are defined - to be associated for local clients with the "loopback" address, 127.0.0.1 - on the lowest level operating system TCP/IP instance which map to the different operating system instances, with redefined ports perhaps - a bit like Network Address Translation? "Oh what a tangled web we weave when first we practice to deceive." So to answer my questions from the snip below: 1. It seems that x3270 is the TELNET 3270 client supplied in the FLEX-ES package. 2. You needn't send me any URLs unless there is one which explains how port 23 takes you through to the CS IP TELNET 3270 server logic. Chris Mason ----- Original Message ----- From: "Chris Mason" <[EMAIL PROTECTED]> Newsgroups: bit.listserv.ibm-main To: <[email protected]> Sent: Sunday, 08 January, 2006 3:24 PM Subject: Re: Manuals on modifying VTAM logon screen? <begin snip> > After all this I still wonder where the 3270 emulation is coming from in the > case of both the use of port 3270 and port 23. I'm afraid that, when asking > for help, you shouldn't assume complete familiarity with what sounds like a > wonderful playpen for getting familiar with z/OS. > > I further suspect that you have been sold falsely on the idea that you do > not need to understand all the tricky bits and pieces that have been > clobbered together under - I guess - the ADCD system label. > > Perhaps you can supply an URL where I can read about the essentials of this > ADCD system and can perhaps disentangle the confusion they have led you > into. > > I now have read Terry's contribution. It would appear that, in order to try > to avoid you actually having to understand what you are doing - always a > futile objective in my experience - ... <end snip> ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
