Draytek VIGOR 3300 User Manual page 60

Protocol
Public Port Range
Private IP
Private Port Range
Use IP Alias
WAN Interface
IP Alias
Click Apply to reboot the system and apply the settings.
Note: The port forwarding function could redirect the Internet traffic, which has the
destination port within the public port range and has the same IP address as WAN
Interface or IP Alias that you set. Please redirect only the ports that you have to
forward rather than forward all ports. Otherwise, the intrinsic firewall type security of
NAT facility will be affected.
By the way, user can click Delete to remove one current existed NAT entry in the Advanced –
NAT – Port Redirection page and click Delete All to remove all entries.
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Assign the transport layer protocol with TCP or UDP.
Assign a port range from starting to end public port number.
The port range is from 1 to 65535.
Assign a local IP address to be transferred into.
Assign a port range from starting to end private port number.
"Disable" option uses IP address of WAN interface, "Enable"
option uses IP alias addresses.
It is a pull-down window; user can select one specific WAN
interface.
It is a pull-down window; user can select one specific IP
address assigned in IP Alias group of WAN interfaces.
Vigor3300 Series User's Guide