Draytek 5500 Series manual Binding WAN, Interface Src IP Start, Dest Port End

Enable	Check this box to enable this policy.
Protocol	Use the drop-down menu to choose a proper protocol for the WAN
	interface.

Binding WAN	Choose the WAN interface (WAN1 or WAN2) for binding.
interface
Src IP Start	Type the source IP start for the specified WAN interface.
Src IP End	Type the source IP end for the specified WAN interface. If this
	field is blank, it means that all the source IPs inside the LAN will
	be passed through the WAN interface.
Dest IP Start	Type the destination IP start for the specified WAN interface.
Dest IP End	Type the destination IP end for the specified WAN interface. If this
	field is blank, it means that all the destination IPs will be passed
	through the WAN interface.
Dest Port Start	Type the destination port start for the destination IP.
Dest Port End	Type the destination port end for the destination IP. If this field is
	blank, it means that all the destination ports will be passed through
	the WAN interface.

32 VigorPro5500 Series User’s Guide