RFC1918 Filtering

All -

I setup the ER Pro8 with the LAN2 Wizard.  Works like a champ.

Do I need an RFC1918 Filter for Egress -- or does the ER do it automatically?

Something like 

network-group RFC1918 {

    network 10.0.0.0/8        

    network 172.16.0.0/12         

    network 192.168.0.0/16   

 }

Then a WAN_OUT rule to drop packets with this group as a destination?

Thanks in Advance

s