PH24174: DAI TCP ENHANCEMENTS FOR AN INVALID CONNECTION REQUEST

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• This enhancement increases the availability of the DAI TCP
  server. The DAI TCP server continues processing without stopping
  even if an invalid connection request such as a port scan is
  received.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM Tools Base for z/OS V1.6    *
  *                 (FMID: HAHN160) who use the Distributed      *
  *                 Access Infrastructure.                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: This APAR enables the DAI TCP server    *
  *                      to continue running without stopping    *
  *                      even if it accepts an invalid           *
  *                      connection request.                     *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  The DAI TCP server terminates with ABEND U0700 when the session
  is disconnected during the connection process and the client
  cannot be identified. This can happen when accepting an invalid
  connection request such as an IP port scan. To avoid this
  unexpected termination, the DAI TCP server is enhanced to
  remove invalid connection requests and continue processing.
  

Problem conclusion

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:

  UI69282

Modules/Macros

• AIINTCP
  

Fix information

• Fixed component name

  IMS TOOLS BASE

• Fixed component ID

  5655V9300

Applicable component levels

• R160 PSY UI69282

     UP20/05/21 P F005  

Fix is available

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