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IV47445: COMMUNICATION FAILS IN IPSEC AND NAT ENVIRONMENT APPLIES TO AIX 7100-03

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APAR status

  • Closed as program error.

Error description

  • IPSec tunnel can be implemented when there is a NAT
router
between two endpoints using NAT traversal. But
communication
fails in both directions even though IKE Phase 1 and 2
are
completed and IPSec tunnel is active.

When NAT Traversal is used, ESP packets are encapsulated
in
UDP packet with source and destination port 4500. The
problem
is a server behind NAT router fails to set UDP port to
4500,
but these are sent in UDP 0 port. This breaks IPSec
communication.

Local fix

  • 



Problem summary


    

  • IPSec will not work while initiator is behind NAT.As initiator
is  not receiving the proper VENDOR id from responder.

    



Problem conclusion


    

  • The responder will send proper VENDOR id and initiator and
responder both will be able to detect the NAT.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV47445
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2013-08-23
    • 

  • Closed date
    2013-08-23
    • 

  • Last modified date
    2014-02-14
    • 





    

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

    
IV47010
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U854686
       UP13/11/22  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"AIX 7.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"","label":""}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            14 February 2014
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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