GUIDELINE
1.0 SUBJECT: TCPaccess - Telnet Services
2.0 DISTRIBUTION: All Current Users
3.0 FROM: Donald C. Heiman, Acting Director of DISC
4.0 PURPOSE: This guideline provides user instructions on how to use the telnet services offered by the MVS TCPaccess product.
5.0 BACKGROUND: Telnet is a standard TCP/IP protocol that describes how logins between computer systems may be accomplished. As long as the telnet rules are followed, described by several Internet Request for Comments (RFCs), these logins can be done across dissimilar computer platforms. RFCs are the means by which the Internet sets standards.
Interlink has provided two types of telnet services through its TCPaccess product. One service, client telnet, allows users that are connected to the DISC MVS host to telnet to other hosts from their "Welcome" screen. Client telnet has some limitations that will be described later in this guideline. Server telnet provides login facilities for those users who are connected to the MVS host via TCP/IP. Server telnet eliminates the need for typical SNA network devices such as controllers, SAA gateways, etc..
6.0 PROCEDURE: This discussion will provide instructions on how to use both client and server telnet described above.
6.1 Client Telnet
6.1.1 Limitations: Client telnet will only support applications on the server host that are NOT block-mode. UNIX commands such as ls, mail, etc. should work fine as long as those applications do not invoke screen formatting.
6.1.2 Usage: Enter the telnet command from the 3270 terminal screen as follows:
telnet host.abc.xyz.ddd (Example using domain name resolution)
or
telnet 111.222.333.444 (Example by IP address)
Whenever you are entering passwords at the server host password prompt, you may hide the password by pressing the PF9 key just before entering the password.
A series of screen images follows, showing a successful login to a SUN host. Since IP hosts have a wide variety of operating systems, your host(s) will likely display different results than shown below.
======================== Screen 1 ===============================
WELCOME HO1A220 TO THE STATE OF KANSAS NETWORK
**FOR USER HELP CALL 785/296-2310, OR YOUR AGENCY HELP DESK IF AVAILABLE**
telnet host1.state.ks.us
================================================================
Telnet command from the Welcome Screen
======================== Screen 2 =============================
REQUESTED SERVICE IS RESTRICTED
PLEASE ENTER USERID: myuserid
AND PASSWORD:
===============================================================
Top Secret Authorization screen
======================== Screen 3 =============================
210 ICP COMPLETE, PORTS:LOCAL=165.201.301.300,4114
REMOTE= 165.201.300.300,23
SunOS UNIX (host1)
login:
===============================================================
Sample UNIX host login screen
======================== Screen 4 =============================
210 ICP COMPLETE,PORTS:LOCAL=165.201.301.300,4116
REMOTE=165.201.300.300,23
SunOS UNIX (host1)
login: jsmith PRESS PF9 to HIDE the PASSWORD
Password: <================================
===============================================================
Login to the UNIX host showing how to hide password
======================== Screen 5 =============================
Last login: Wed Jan 4 15:03:02 from mvs1.da.state.ks
SunOS Release 4.1.1 (GENERIC)#1: Thu Oct 11 10:25:14 PDT 1990
Welcome to the State of Kansas
host1 %
===============================================================
Successful Login
6.2 Server Telnet
6.2.1 Server telnet provides login support to the MVS host for those who are connected to the Internet. The user's IP stack must provide a telnet that is capable of supporting TN3270, the 3270 version of telnet. Line-mode telnet will NOT have the desired results.
6.2.2 Two criteria must be met to access the MVS host as explained below:
6.2.2.1 A logon to an MVS application, such as CICSP, requires that "virtual terminals" must be defined between the TCPaccess product and VTAM. The Internet address of your host is passed to TCPaccess when the telnet connection is made. That address is used to assign your SNA session to a pool of virtual terminals that have been configured for your IP address. If TCPaccess does not know about your IP address, you will receive a message:
No applicable LUrule for LU assignment
and the session will be terminated. In general, these pools of virtual terminals are assigned to state agencies. If you receive the message above, or the following message:
No LU available in LUpool
you should contact your agency network administrator. The latter message indicates the LUpool is currently full and may need to be expanded.
6.2.2.2 The attached appendix describes what telnet ports connect to which MVS application.
6.2.3 Keyboard mapping functions must be provided by the client TN3270 program. Those individuals responsible for implementing TN3270 on their systems must insure that the necessary keys are defined and that information is disseminated throughout their user community.
6.2.4 TN3270 sessions without activity for 60 minutes will be terminated by TCPaccess. This helps to conserve mainframe resources and serves to cleanup "hung" sessions.
6.2.5 A series of screen images follows, showing a successful login from a PC, connected to the Internet using FTP's PC/TCP product. Since IP hosts have a wide variety of operating systems and TN3270 programs, your host(s) will likely display different results than shown below.
======================== Screen 6 =============================
C:\>
C:\>tn mvsl.da.state.ks.us 1023
(This will telnet to the CICSP application. Note port 1023 in the command.)
===============================================================
DOS command to telnet to the MVS host (CICSP)
======================== Screen 7 =============================
CICS Sign on
Type your userid and password:
Userid ==>
Password ==>
Language ==>
New Password ==>
New Password ==>
PF3 = End
DFHCE3520 PLEASE TYPE YOUR USERID.
===============================================================
CICSP logon screen
======================== Screen 8 ==============================
C:\>
C:\>tn mvsl.da.state.ks.us
(This will telnet to the well-known port 23. This is routed to the special gateway)
===============================================================
DOS command to telnet to the default port for MVS
======================== Screen 9 =============================
------------------- STATE OF KANSAS ------------------
Terminal: KSDA5002 Date: 01/13/95
Time: 09:14:34
Please login:
Userid===>
Password===> Change Password?===> N (Y or N)
ENTER USERID
Network NO NEWS
Bulletins:
FOR HELP WITH THIS FACILITY, CALL (785)296-2310 OR 296©7016
ADDRESS COMMENTS AND SUGGESTIONS TO PROFS ID: CWK7016
----------------------------------------------------------------------------------------------------------
PF1/13 – Help PF10/22 – News PF12/24 - Exit
===============================================================
Sessions Manager logon screen (default port 23)
======================= Screen 10 =============================
------------------- STATE OF KANSAS --------------------
Terminal: KSDA5002 Date: 01/13/95
Userid: TSSYCKI Time: 10:11:55
Select Application===> or use PF Key
PF Key Application Description Status
PF1 CICSP DISC PROD CICS ACT
PF2 CICST DISC TEST CICS ACT
PF3 IBMECS IBM ADVANTIS ACT
PF4 MAPPER22 UNISYS MAPPER22 ACT
PF5 ROSKAN DISC ROSCOE ACT
ROSTST TEST ROSCOE INAC
PF7 TIS DISC PRODUCTION TIS ACT
PF8 TISTEST DISC TEST TIS ACT
Network NO NEWS
Bulletins:
FOR HELP WITH THIS FACILITY, CALL (785)296-2310 OR 296-7016
ADDRESS COMMENTS AND SUGGESTIONS TO PROFS ID: CWK7016
-------------------------------------------------------------------------------------------------------
PF13-Help PF19-Back PF20-Forward PF22-News PF12/24-Exit
===============================================================¬=
Session Manager selection screen (default port 23)
7.0 CANCELLATION: This is a new publication
8.0 CONTACT PERSON: Boyce McCarter - Systems Software Manager, 785-296-3343
REFERENCE: Standard 4409, Usage of the MVS TCPaccess Product
ATTACHMENT: Appendix: Telnet IP Ports
APPENDIX Guideline 4612.00
TELNET IP PORTS
Telnet Port MVS Application
23 Special Session Manager*
1023 CICSP
1024 VMKS
1025 GW1
1026 TSOQ
1027 ROSKAN
1028 CICSTQ
1029 CICSTTR
1030 CICSUSR
1031 GW2
1032 ROSTST
* The special session manager is an application that provides a menu of applications available through the MVS host. Access to the menu is controlled via Top Secret userid.
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