ViewSonic WR100 User Manual page 30

the ports at the same time to one PC. The Port Forwarding feature
is more secure because it only opens the ports you want to have
opened, while DMZ hosting opens all the ports of one computer,
exposing the computer so the Internet can see it.
Any PC whose port is being forwarded must have its DHCP client
function disabled and should have a new static IP address
assigned to it because its IP address may change when using the
DHCP function.
1
To expose one PC, select Enable.
2
Enter the computer's IP address in the DMZ Host IP Address
field.
3
Click the Apply button.
Block WAN ICMP Request: By enabling the Block WAN Request
feature, you can prevent your network from being "pinged," or
detected, by other Internet users. The Block WAN Request feature
also reinforces your network security by hiding your network ports.
Both functions of the Block WAN Request feature make it more
difficult for outside users to work their way into your network. This
feature is enabled by default. Select Disable to disable this feature.
Check all the settings and click Apply to save them.
ViewSonic Wireless Router 26