Firewall General Settings - ZyXEL Communications AX Series User Manual

• Use the DoS screen to activate protection against Denial of Service (DoS) attacks
page 261).

16.3 Firewall General Settings

Use the firewall to protect your Zyxel Device and network from attacks by hackers on the Internet and
control access to it. 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. A higher firewall level means more
restrictions on the Internet activities you can perform. Click Security > Firewall > General to display the
following screen. Use the slider to select the level of firewall protection.
Figure 170 Security > Firewall > General
Note: LAN to WAN is your access to all Internet services. WAN to LAN is the access of other
computers on the Internet to devices behind the Zyxel Device.
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.
The following table describes the labels in this screen.
Table 88 Security > Firewall > General
LABEL DESCRIPTION
IPv4 Enable firewall protection when using IPv4 (Internet Protocol version 4).
Firewall
IPv6 Enable firewall protection when using IPv6 (Internet Protocol version 6).
Firewall
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(Section 16.6 on