Draytek Vigor2820 Series User Manual page 96

Click the index number link to open the configuration page.
Enable
Protocol
WAN Interface
WAN IP
Private IP
Subnet Mask
Vigor2820 Series User's Guide
Check to enable this entry.
Specify the transport layer protocol. It could be TCP, UDP, or
ALL for selection.
Specify the WAN interface that will be used for this entry.
Select an IP address (the selections provided here are set in IP
Alias List of Network >>WAN interface). Local host can use this
IP to connect to Internet.
If you want to choose any on of the Public IP settings, you must
specify some IP addresses in the IP Alias List of the Static/DHCP
Configuration page first. If you did not type in any IP address in the
IP Alias List, the Public IP setting will be empty in this field. When
you click Apply, a message will appear to inform you.
Assign an IP address (e.g., 192.168.1.10) or a subnet to be
compared with the Public IP address for incoming packets.
Select a value of subnet mask for private IP address.
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