Port Filtering; Figure 13 Advanced: Port Filtering; Table 14 Advanced: Port Filtering - ZyXEL Communications P-974H - V3.70 Manual

5.5 Port Filtering

You can set the ZyXEL Device to drop traffic based on service port numbers and
protocol types. This feature allows you to specify the applications (such as MSN
and TFTP) the computers on the LAN cannot use. See
common services.
Click Advanced > Port Filtering to display the configuration screen.

Figure 13 Advanced: Port Filtering

The following table describes the labels in this screen.

Table 14 Advanced: Port Filtering

LABEL
Start Port
End Port
Protocol
Enabled
Apply
P-974H/HW Series User's Guide
DESCRIPTION
Enter the beginning service port number whose traffic you want the
ZyXEL Device to block.
Type the ending service port number whose traffic you want the ZyXEL
Device to block. If you want to exclude only one service, enter the same
service port number as in the Start Port field above.
Specify the traffic protocol type. Choices are TCP, UDP and Both.
Select Enabled to block traffic based on the selected port number(s)
and protocol type.
Click Apply to save the settings.
Chapter 5 Advanced
Appendix D on page 99 for
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