ZyXEL Communications P-870HW-I User Manual
P-870HW-I1 User’s Guide
Chapter 11 Firewalls
161
Figure 89 Security > Firewall > Rules > Edit > Edit Customized Services > Edit
The following table describes the labels in this screen.
11.6 Anti-Probing Screen
Use this screen to control the way the ZyXEL Device responds to ping requests and to requests
for unsupported services. Normally, if an outside user attempts to probe an unsupported port
on your ZyXEL Device, the ZyXEL Device sends a response. This allows the outside user to
know the ZyXEL Device exists. The ZyXEL Device supports anti-probing, which prevents the
ZyXEL Device from sending the response. This keeps outsiders from discovering your
ZyXEL Device when unsupported ports are probed.
for unsupported services. Normally, if an outside user attempts to probe an unsupported port
on your ZyXEL Device, the ZyXEL Device sends a response. This allows the outside user to
know the ZyXEL Device exists. The ZyXEL Device supports anti-probing, which prevents the
ZyXEL Device from sending the response. This keeps outsiders from discovering your
ZyXEL Device when unsupported ports are probed.
To open this screen, click a rules number in Security > Firewall > Anti Probing.
Table 68 Security > Firewall > Rules > Edit > Edit Customized Services > Edit
LABEL
DESCRIPTION
Service Name
Type a unique name for your custom port.
Service Type
Choose the IP port (TCP, UDP or TCP/UDP) that defines your customized port from
the drop down list box.
Port Configuration
Type
Click Single to specify one port only or Range to specify a span of ports that define
your customized service.
Port Number
Type a single port number or the range of port numbers that define your customized
service.
Apply
Click this to save your changes back to the ZyXEL Device.
Cancel
Click this to begin configuring this screen afresh.
Delete
Click this to delete the current rule and return to the previous screen.