ZyXEL NBG-460N User Guide - Page 172

Chapter 13 Firewall 13.4 General Firewall Screen Use this screen to enable or disable the NBG-460N's firewall, and set up firewall logs. Click Security > Firewall to open the General screen. Figure 112 Security > Firewall > General The following table describes the labels in this screen. Table 59 Security > Firewall > General LABEL DESCRIPTION Enable Firewall Select this check box to activate the firewall. The NBG-460N performs access control and protects against Denial of Service (DoS) attacks when the firewall is activated. Packet Direction This is the direction of travel of packets. Firewall rules are grouped based on the direction of travel of packets to which they apply. Log Select whether to create a log for packets that are traveling in the selected direction when the packets are blocked (Log All) or forwarded (Log Forward). Or select Not Log to not log any records. Apply Reset To log packets related to firewall rules, make sure that Access Control under Log is selected in the Logs > Log Settings screen. Click Apply to save the settings. Click Reset to start configuring this screen again. 13.5 Services Screen If an outside user attempts to probe an unsupported port on your NBG-460N, an ICMP response packet is automatically returned. This allows the outside user to know the NBG-460N exists. Use this screen to prevent the ICMP response packet from being sent. This keeps outsiders from discovering your NBG-460N when unsupported ports are probed. 172 NBG-460N User's Guide