TNS Database Error Messages TNS-02526: server proxy type does not match client type November 5, 2020 mpbod TNS-02526: server proxy type does not match client type Cause: The authentication type selected by the server does not match that picked by the client. Action: Contact Oracle Support Services. Back to previous menu https://support.oracle.com/ http://www.oracle.com/ Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)