How to fix the Oracle error ORA-12666: Dedicated server: outbound transport protocol different from inbound?

In this post, you’ll learn more about the Oracle ErrorORA-12666: Dedicated server: outbound transport protocol different from inbound with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12666: Dedicated server: outbound transport protocol different from inbound

Reason for the Error ORA-12666: Dedicated server: outbound transport protocol different from inbound

The protocol specified for an externally-identified outbound connection from a dedicated server (database link) was not the same as that used for the inbound connection. It is not possible for Oracle Net to authenticate a proxy connection that uses a protocol that is different from that which was used for the connection to the dedicated server.

How to fix the Error ORA-12666: Dedicated server: outbound transport protocol different from inbound ?

You can fix this error in Oracle by following the below steps

Specify the same protocol in the Oracle Net connect descriptor for the outbound connection as that used for the inbound connection.