Don’t give password to Listener in 10g

As a security hole in 9i database we always give password to listener,

But this is chaged since 10g, if we give password to listener in 10g

this will become a security hole. Oracle solve this in 10g.

http://andrewfraser.wordpress.com/2007/05/24/listener-passwords-always-for-9i-never-for-10g/