Icmp Screen; Technical Reference; About Nat - ZyXEL Communications LTE7460-M608 User Manual

7.16 ICMP Screen

If an outside user attempts to probe an unsupported port on your LTE7460-M608, an Internet Control
Message Protocol (ICMP) response packet is automatically returned. This allows the outside user to know
the LTE7460-M608 exists. Your LTE7460-M608 supports anti-probing, which prevents the ICMP response
packet from being sent. This keeps outsiders from discovering your LTE7460-M608 when unsupported
ports are probed.
To change your LTE7460-M608's security settings, click Networking > ICMP. The screen appears as shown.
Note: If you want your device to respond to pings and requests for unauthorized services, you
will also need to configure the firewall accordingly by disabling SPI.
Figure 62 Networking > ICMP
The following table describes the labels in this screen.
Figure 63 Networking > ICMP
LABEL
ICMP Statements
Enable WAN Ping Respond
Enable LAN Ping Respond
Apply
Reset

7.17 Technical Reference

This section provides some technical background information about the topics covered in this chapter.

7.17.1 About NAT

Inside/outside denotes where a host is located relative to the LTE7460-M608, for example, the computers
of your subscribers are the inside hosts, while the web servers on the Internet are the outside hosts.
Chapter 7 Networking
DESCRIPTION
The LTE7460-M608 will not respond to any WAN incoming Ping requests when Enable
WAN Ping Respond is not selected. Select the check box to reply to incoming WAN
Ping requests.
The LTE7460-M608 will not respond to any LAN incoming Ping requests when Enable
LAN Ping Respond is not selected. Select the check box to reply to incoming LAN
Ping requests.
Click Apply to save your changes back to the LTE7460-M608.
Click Reset to reload the previous configuration for this screen.
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