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PH42921: UNABLE TO BLOCK IP ENDING IN 255 IF 0 IS BLOCKED

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APAR status

  • Closed as program error.

Error description

  • Unable to use NETSTAT BLOCK if IP address ending in .255 if the
same IP ending in .0 is also blocked.

Local fix

  • N/A

Problem summary

  • ****************************************************************
* USERS AFFECTED: All z/VM users of the NETSTAT BLOCK and      *
*                 NETSTAT FILTER command.                      *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
****************************************************************
* RECOMMENDATION: APPLY PTF                                    *
****************************************************************
When issuing a NETSTAT BLOCK command,
user is unable to block an address
ending in 255 if an address ending in
0 is already blocked and vice versa.

Problem conclusion

  • The NETSTAT BLOCK command has been updated to allow addresses
ending in 255 when addresses ending in 0 are already blocked or
vice versa.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PH42921
    • 

  • Reported component name
    TCP/IP FOR Z/VM
    • 

  • Reported component ID
    5735FAL00
    • 

  • Reported release
    720
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2021-12-20
    • 

  • Closed date
    2022-01-05
    • 

  • Last modified date
    2022-01-12
    • 





    

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

    • 

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

    
UI78817 UI78818
    

    • 



Modules/Macros


    

  • TCPARSE

    



Fix information


    

  • Fixed component name
    TCP/IP FOR Z/VM
    • 

  • Fixed component ID
    5735FAL00
    • 



Applicable component levels


    

  • R710  PSY  UI78817
       UP22/01/12  I  1000
    • 

  • R720  PSY  UI78818
       UP22/01/12  I  1000
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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              [{"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SG27M","label":"APARs - z\/VM Environment"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"720","Line of Business":{"code":"LOB16","label":"Mainframe HW"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            27 January 2025
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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