The Firewall General Screen - ZyXEL Communications AMG1302-T10A User Manual

Chapter 10 Firewalls
Anti-Probing
If an outside user attempts to probe an unsupported port on your Device, an ICMP response packet
is automatically returned. This allows the outside user to know the Device exists. The Device
supports anti-probing, which prevents the ICMP response packet from being sent. This keeps
outsiders from discovering your Device when unsupported ports are probed.
ICMP
Internet Control Message Protocol (ICMP) is a message control and error-reporting protocol
between a host server and a gateway to the Internet. ICMP uses Internet Protocol (IP) datagrams,
but the messages are processed by the TCP/IP software and directly apparent to the application
user.

10.2 The Firewall General Screen

Use this screen to configure the firewall settings. Click Security > Firewall to display the following
screen.
Figure 77 Security > Firewall > General
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AMG1302-T10A User's Guide