ZyWALL 2 Series User’s Guide

17.16Configuring Security

To change your ZyWALL’s Security settings, click REMOTE MGNT, then the Security tab. The screen appears as shown.

If an outside user attempts to probe an unsupported port on your ZyWALL, an ICMP response packet is automatically returned. This allows the outside user to know the ZyWALL exists. The ZyWALL series support anti-probing, which prevents the ICMP response packet from being sent. This keeps outsiders from discovering your ZyWALL when unsupported ports are probed.

 

Figure 17-24 Security

The following table describes the fields in this screen.

 

Table 17-8 Security

 

 

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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Remote Management Screens