by chance is this a Virtual install of the unsupported CentOS 6.5 ?
6.5 is unsupported
6.6 is also unsupported
6.7 is the current in the older 6 series
also in Centos 6 you have two network managers and both can not be "on" at the same time
Network Manager ( includes wireless )
check your system services and see what one is on
network manager has a icon in the gnome2 toolbar ( lower right ) next to the sound icon
Last edited by John VV; 03-03-2016 at 07:48 PM.