We have ORACLE database 9iR2 run on UNIX servers. Sometime when we doing database maintenance, we don't want users connect to DB. for SQL/net connection I can STOP listener. For JDBC client connection, how to avoid it? Thanks. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- //www.freelists.org/webpage/oracle-l