IT35543: THE LOCATION HEADER GETS REWRITTEN IN ANY CASE BY THE LOCATION HEADER REWRITE FEATURE WHEN THE HOST CANNOT BE RESOLVED

Fix packs for DataPower Gateway version 2018.4.1

APAR status

• Closed as program error.

Error description

• The issue with the Location header rewrite feature in MPGW
  service. Even though the host name in the location header does
  not match the backend host name, the location header gets
  rewritten.
  If host & location cannot be resolved, a check if
  the resolution succeed before comparing the 2 addresses is not
  happening and the appliance 'accidentally' thinks they are the
  same.
  
  The logs show:
  ... [0x80e00793][mpgw][info] mpgw(...):
  trans(...)[...] gtid(...): Rewrite the host name and port of
  the URL in Location response header '...' with the host name
  and port of the Host request header value '...'. The value of
  the Location response header URL is rewritten to '...'.
  

Local fix

Problem summary

• The fix would check if the host in the Location header can be
  resolved by DNS and if not does not rewrite the header.
  

Problem conclusion

• Fix is available in 10.0.1.3 and 2018.4.1.16
  
  For a list of the latest fix packs available, please see:
  https://www.ibm.com/support/pages/node/83105
  

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

  DATAPOWER

• Fixed component ID

  DP1234567

Applicable component levels

• R18X PSY

     UP

• RA0X PSY

     UP