Chapter 13 Firewall
LTE Series User’s Guide
185
DoS Thresholds
For DoS attacks, the Zyxel Device uses thresholds to determine when to drop sessions that do not
become fully established. These thresholds apply globally to all sessions. You can use the default
threshold values, or you can change them to values more suitable to your security requirements.
13.2 Firewall
13.2.1 What You Can Do in this Chapter
• Use the General screen to configure the security level of the firewall on the Zyxel Device (Section 13.3
on page 185).
• Use the Protocol screen to add or remove predefined Internet services and configure firewall rules
(Section 13.4 on page 187).
• Use the Access Control screen to view and configure incoming/outgoing filtering rules (Section 13.5
on page 188).
• Use the DoS screen to activate protection against Denial of Service (DoS) attacks (Section 13.6 on
page 191).
13.3 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.
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