TNS-12667: Shared server: outbound transport protocol different from inbound

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

Action: Specify the same protocol in the SQL*Net connect string or alias for the outbound connection as that used for the inbound connection.

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