The Firewall Services Screen - ZyXEL Communications EMG1302-R10A User Manual

Chapter 16 Security

16.5 The Firewall Services Screen

If an outside user attempts to probe an unsupported port on your EMG1302-R10A, an ICMP
response packet is automatically returned. This allows the outside user to know the EMG1302-R10A
exists. Use this screen to prevent the ICMP response packet from being sent. This keeps outsiders
from discovering your EMG1302-R10A when unsupported ports are probed.
Click Configuration > Security > Firewall > Services to display the following screen.
Figure 73 Configuration > Security > Firewall > Services
The following table describes the labels in this screen.
Table 53 Configuration > Security > Firewall > Services
LABEL
ICMP
ICMP
Respond to Ping on
126
DESCRIPTION
Internet Control Message Protocol 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.
The EMG1302-R10A will not respond to any incoming Ping requests when Disable is
selected. Select LAN to reply to incoming LAN Ping requests. Select WAN to reply to
incoming WAN Ping requests. Otherwise select LAN & WAN to reply to all incoming
LAN and WAN Ping requests.
EMG1302-R10A User's Guide