OERR: ORA-28040 "No matching authentication protocol" Reference Note (Doc ID 288402.1)

OERR: ORA-28040 "No matching authentication protocol" Reference Note (Doc ID 288402.1)

PURPOSE

This is a brief reference note to show the meaning of database error "ORA-28040". It includes the error text, "Cause" and "Action" from message files for each database version from 9.2 onwards, along with search links and details of any database bug issues related to the error.

SCOPE

This note is intended for general audience as a starting point to check the meaning of "ORA-28040". It does not give detailed information about the error and does not give error message text for versions below 9.2 .

DETAILS

Error Text, Cause and Action from Message File/s for ORA-28040

Versions 12.1

Error:  ORA-28040 No matching authentication protocol 
---------------------------------------------------------------------------
Cause:  There was no acceptable authentication protocol for either client or 
 server. 
Action: The administrator should set the values of the 
 SQLNET.ALLOWED_LOGON_VERSION_SERVER and 
 SQLNET.ALLOWED_LOGON_VERSION_CLIENT parameters, on both the client and 
 on the server, to values that match the minimum version software 
 supported in the system. This error is also raised when the client is 
 authenticating to a user account which was created without a verifier 
 suitable for the client software version. In this situation, that 
 account's password must be reset, in order for the required verifier to 
 be generated and allow authentication to proceed successfully. 

Versions 10.1, 10.2, 11.1, 11.2

Error:  ORA-28040 No matching authentication protocol 
---------------------------------------------------------------------------
Cause:  No acceptible authentication protocol for both client and server 
Action: Administrator should set SQLNET_ALLOWED_LOGON_VERSION parameter on 
 both client and servers to values that matches the minimum version 
 supported in the system. 

1.Go to Database server

2.source database environment file

3.cd $TNS_ADMIN

4.vi sqlnet.ora

5.add below line



SQLNET.ALLOWED_LOGON_VERSION_SERVER=8

SQLNET.ALLOWED_LOGON_VERSION_CLIENT=8