Oracle Solution for Error ora-03136

ORA-03136: inbound connection timed out

What triggered the Error:

Inbound connection was timed out by the server because user authentication was not completed within the given time specified by SQLNET.INBOUND_CONNECT_TIMEOUT or its default value

What should we do to fix it:

1) Check SQL*NET and RDBMS log for trace of suspicious connections. 2) Configure SQL*NET with a proper inbound connect timeout value if necessary.