Re: database link

Posted by ErmanArslansOracleBlog on Jul 18, 2017; 11:51am
URL: http://erman-arslan-s-oracle-forum.124.s1.nabble.com/database-link-tp2964p2986.html

 Check whether the TCP.VALIDNODE_CHECKING is active on that database server.

If it is active then check whether IP address of the failing client is added in the TCP.INVITED_NODES list (located in the sqlnet.ora file). If not add the same. (or just disable the TCP validnode checking)