Chapter 16 Firewall
VSG1435-B101 Series User’s Guide
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16.2 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 93 Security Settings > Firewall
The following table describes the labels in this screen.
16.3 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 385 for some
examples.
Table 65 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.
