ZyXEL Communications NBG334W - Manual (Page 146)

Chapter 13 Firewall
NBG334W User’s Guide
146
The following table describes the labels in this screen.
13.4 Services Screen
Click Security > Firewall > Services. The screen appears as shown next.
If an outside user attempts to probe an unsupported port on your NBG334W, an ICMP
response packet is automatically returned. This allows the outside user to know the NBG334W
exists. Use this screen to prevent the ICMP response packet from being sent. This keeps
outsiders from discovering your NBG334W when unsupported ports are probed.
You can also use this screen to enable service blocking, enter/delete/modify the services you
want to block and the date/time you want to block them.
Figure 81 Security > Firewall > Services
Table 55 Security > Firewall > General
LABEL DESCRIPTION
Enable Firewall Select this check box to activate the firewall. The NBG334W 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.
To log packets related to firewall rules, make sure that Access Control under Log
is selected in the Logs > Log Settings screen.
Apply Click Apply to save the settings.
Reset Click Reset to start configuring this screen again.