Users Manual Part 2

Chapter 16 Firewall
PX7511-B0 User’s Guide
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Note: When the security level is set to High, Telnet, FTP, HTTP, HTTPS, DNS, IMAP, POP3, SMTP,
and/or IPv6 ICMPv6 (Ping) traffic from the LAN are still allowed.
Click Security > Firewall to display the General screen.
Figure 118 Security > Firewall > General
The following table describes the labels in this screen.
Table 76 Security > Firewall > General
LABEL DESCRIPTION
IPv4 Firewall Use the switch to turn on or off the firewall on the Zyxel Device for IPv4 traffic. When the switch
goes to the right , the function is enabled. Otherwise, it is disabled.
IPv6 Firewall Use the switch to turn on or off the firewall on the Zyxel Device for IPv6 traffic. When the switch
goes to the right , the function is enabled. Otherwise, it is disabled.
Low Select Low to allow traffic from LAN to WAN or from WAN to LAN.
Medium Select Medium to allow traffic from LAN to WAN but deny traffic from WAN to LAN.
High Select High to deny both directions of travel of packets (LAN to WAN and WAN to LAN) .
Cancel Click Cancel to restore your previously saved settings.
Apply Click Apply to save your changes.