In this post, you’ll learn more about the Oracle ErrorTNS-12668: Dedicated server: outbound protocol does not support proxies with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
TNS-12668: Dedicated server: outbound protocol does not support proxies
Reason for the Error TNS-12668: Dedicated server: outbound protocol does not support proxies
Cause: The protocol specified to perform an externally-identified proxy connection (database link) from a dedicated server does not support proxy connections.
How to fix the Error TNS-12668: Dedicated server: outbound protocol does not support proxies ?
You can fix this error in Oracle by following the below steps
Action: Specify a protocol in the Oracle Net connect descriptor used for the connection that does support externally-authenticated proxy connections. NOTE: Because of a limitation in Oracle Net, the protocol used for the proxy connection must the same as that used for the connection from the client to the server.