Chapter 16 Remote Management
16.7 The ICMP Screen
To change your ZyXEL Device’s security settings, click Advanced > Remote MGMT > ICMP. The screen appears as shown.
If an outside user attempts to probe an unsupported port on your ZyXEL Device, an ICMP response packet is automatically returned. This allows the outside user to know the ZyXEL Device exists. Your ZyXEL Device supports
Note: If you want your device to respond to pings and requests for unauthorized services, you may also need to configure the firewall anti probing settings to match.
Figure 94 Advanced > Remote Management > ICMP
The following table describes the labels in this screen.
Table 68 Advanced > Remote Management > ICMP
LABEL | DESCRIPTION |
ICMP | 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. |
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Respond to | The ZyXEL Device will not respond to any incoming Ping requests when |
Ping on | 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 both incoming LAN and WAN Ping requests. |
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Apply | Click this to save your changes. |
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Cancel | Click this to restore your previously saved settings. |
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