Static IP
If your ISP assigns a fixed IP address to you, then select Static IP,
and enter the IP address, subnet mask, primary DNS and
secondary DNS(optional) info provided by your ISP in
corresponding fields.
IP Address: Enter the WAN IP address provided by your ISP.
Consult your ISP if you are not clear.
Subnet Mask: Enter WAN Subnet Mask provided by your ISP.
The default is 255.255.255.0.
Gateway: Enter the WAN Gateway provided by your ISP.
Primary DNS Server: Enter the DNS address provided by
your ISP.
Secondary DNS Server: Enter the other DNS address if your
ISP provides 2 such addresses (optional).