sudo not working

[Make Compile]

Hi guys,

any ideas on this? i've been been configuring out sudo account on rhel5.0, unfortunately, i've configured sudo for a user andrew with restricted syntax of /sbin/ifconfig when i test the account the user can still view ip settings of linux box. any ideas on how to restrict specific command on visudo 

sample : 

editing using visudo command.


andrew localhost = !/sbin/ifconfig

when i logged in using andrew's credential, and try issuing the command /sbin/ifconfig the user andrew can still view ip settings. any ideas? is this normal? Thanks