IC88908: *.FORCEREMOTEDNS PROPERTY IS NOT WORKING FOR SFTP COMMUNICATION

APAR status

• Closed as program error.

Error description

• *.forceRemoteDNS property is not working for SFTP
  communication. SI is doing reverse IP lookup causing SFTP
  Client Begin Session Service taking more time to complete
  

Local fix

Problem summary

•  Users Affected:
  All SFTP Client Users
  
  Problem Description:
  SFTP Client Begin Sessionm Service takes long time apprx 30 secs
  to complete
  We saw the issue becuase of DNS reverse lookup operation which
  was going for the HotstKeyValidation for Maveric while
  exchanging the Key
  
  Platforms Affected:
  All
  

Problem conclusion

• SFTP slowness is seen during DNS reverse lookup operation
  
  Resolution Summary:
  Reverse lookup operation from Address to IP conversion was a
  costly operation which was slowing down the SFTP begin session.
  Modified to go for DNS lookup by passing the IP instead of
  Hostname, with this reverse DNS lookup does not take place,
  which can again improve the performance.
  Performance improved from 30s to min of 2s in the customer
  system.
  Tested SFTP communication with both IP and Hostname
  configured on the profile.. It is working with Internal and
  external perimeter servers configured.
  
  Delivered In:
  5020500
  

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:

Fix information

• Fixed component name

  STR B2B INTEGRA

• Fixed component ID

  5725D0600

Applicable component levels

• R524 PSY

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