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ORA-12638 Using Kerberos Authentication From The Clients Within NATed Firewall (Doc ID 438290.1)

Last updated on FEBRUARY 01, 2022

Applies to:

Advanced Networking Option - Version 9.0.1 to 10.2.0
Information in this document applies to any platform.
Oracle Database version 9.0 to 10.2


The database server is configured for Kerberos authentication and placed behind the firewall. The client's are using NATing to get Ticket Granting Ticket from the Kerberos Server. Client's authentication with the database is failing with ORA-12638 error.


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