org.fedoraproject.slip.dbus.service.PolKit.NotAuthorizedException.org.fedoraproject.config.firewall.auth:

On new EL6 box, by default access auth policy is required to access firewall setups from remote(even ssh from root@localhost).

solution, 1.  access root from local by sudo/su.

solution,2. add remote access policy file.

Sample:system-config-firewall from remote machine