Airlink ARW027 - Manual (Page 42)

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2-6 Firewall
The Broadband Router provides extensive firewall protection by
restricting connection parameters to limit the risk of hacker attacks, and
defending against a wide array of common hacker attacks.
The Broadband Router provides packet filtering rules by restricting
service ports, IP address, or MAC address. However, for applications that
require unrestricted access to the Internet, configure a specific
client/server as a demilitarized zone (DMZ).
2-6-1 Block WAN Ping
When the "Discard PING from WAN side" is activated, the Broadband
Router will not to respond to ping commands originating from the WAN.
Pinging public WAN IP addresses is a common method used by hackers
to test whether the WAN IP address is valid and supports a network.
ID Server IP Mapping Port Type Comment
1 192.168.2.20 80 TCP Web Server
2 192.168.2.12 20 TCP FTP Server
3 192.168.2.12 21 TCP FTP Server
4 192.168.2.28 23 TCP Telnet Server