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ORA-3136/TNS-12535 or Hang Reported for Connections Across Firewall (Doc ID 974783.1)

Last updated on NOVEMBER 30, 2022

Applies to:

Oracle Net Services - Version to [Release 10.2 to 12.2]
Oracle Database - Enterprise Edition - Version to [Release 19]
Information in this document applies to any platform.
Oracle Net Connection cross firewalls


Remote connections that traverse a firewall report ORA-3136 WARNING inbound connection timed out or hang.
Oracle Net client trace shows the following:


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