This is the best way to do dynamic NAT set public rang on wan interface and add NAT rule like I use 6 public IP ip address add address=x.x.x.x1/x interface=WAN ip address add address=x.x.x.x2/x interface=WAN ip address add address=x.x.x.x3/x interface=WAN ip address add address=x.x.x.x4/x interface=...