As a security best practice, restrict the ability to change the network interface setting to privileged users. If users manipulate network interfaces, it might result in bypassing network security mechanisms or denial of service. Ensure that network interfaces are not configured for user control.

1

To verify user control settings, run the #grep -i '^USERCONTROL=' /etc/sysconfig/network/ifcfg* command.

2

Make sure that each interface is set to NO.