User's Manual

Chapter 15 Firewall
P-873HNUP-51B User’s Guide
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15.2 The Firewall Screen
Use this screen to set the security level of the firewall on the ZyXEL Device. Firewall rules are
grouped based on the direction of travel of packets to which they apply.
Click Security Settings > Firewall to display the following screen.
Figure 90 Security Settings > Firewall
The following table describes the labels in this screen.
15.3 The Protocol Screen
You can configure customized services and port numbers in the Protocol screen. For a
comprehensive list of port numbers and services, visit the IANA (Internet Assigned Number
Authority) website. See Appendix E on page 333 for
som
e examples.
Table 67 Security Settings > Firewall
LABEL DESCRIPTION
Low Select Low to allow LAN to WAN and WAN to LAN packet directions.
Medium Select Medium to allow LAN to WAN but deny WAN to LAN packet directions.
High Select High to deny LAN to WAN and WAN to LAN packet directions.
Apply Click Apply to save your changes.
Cancel Click Cancel to restore your previously saved settings.