OA25712: HOD: WHEN THE PROTOCOL IS CHANGED FROM TELNET TO TLS OR SSL AND BACK TO TELNET, THE PORT NUMBER CHANGES FROM 23 TO 992 TO 23.

APAR status

• Closed as program error.

Error description

• Host On-Demand V10
  __________________
  When defining a session to be secure or non-secure, the port
  number used is the well-known port number associated with the
  protocol.  When a telnet session is set up, the default port
  number of 23 is automatically set.  When the session is changed
  to Telnet-SSL or Telnet-TLS, the port number changes to 992 un-
  less manually changed.  In this situation, the customer is using
  port 23 as both secure and non-secure.  They want the port to
  remain 23 regardless of what protocol is selected.
  If a port number that is not 23 is used, for example, 2023,
  the port number does not change back to 992 or 23 when the
  protocol is changed.
  A parameter is to be added to allow for use and editing of
  port 23 as a secure and non-secure port.
  

Local fix

• Manually change the port to 23 each time it is changed.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Host On-Demand users changing protocol       *
  *                 type in the connection panel                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: If the Host On-Demand session port of   *
  *                      23 is used for both secure and          *
  *                      non-secure, you must manually change    *
  *                      the port number to 23 again for secure  *
  *                      as the port number will change to 992   *
  *                      automatically as this has been          *
  *                      hard-coded as the common secure port.   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  if you select the protocol property to be Telnet-TLS in a
  Host On-Demand session, the port will change to 992.
  If you manually change the port number to be 23 instead of 992
  and then switch the protocol back to Telnet, the port will
  remain as 23.
  If you then change the protocol to Telnet-TLS again, the port
  number will change to 992 instead of remaining as 23 as you had
  originally edited.
  If you change the port number to a number other than 23 or
  992, switching back and forth does not change the port number.
  

Problem conclusion

• The design was intentional to prevent users from forgetting to
  change the port back to a secure or non-secure port when they
  changed protocols. The common non-secure port for telnet and
  the common secure port numbers were used.
  The use of 23 as a secure port was not considered as a option.
  A parameter of "disablePortChange" has been added.  When set
  to true, the port number does not change even when the
  protocol type is changed in the connection panel.  The default
  value for this parameter is false.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• HOD_BEAN
  

Fix information

• Fixed component name

  HOD MVS

• Fixed component ID

  5733A5900

Applicable component levels

• RA00 PSY

     UP