ZyXEL Communications Corporation VMG1312T10C Benutzerhandbuch

 Chapter 14 Firewall

VMG1312-T10C User’s Guide

The following table describes the labels in this screen.

Click Security > Firewall > Rules to display the following screen. This screen displays a list of the 
configured firewall rules. Note the order in which the rules are listed.

Note: The ordering of your rules is very important as rules are applied in turn.

Security > Firewall > Rules 

The following table describes the labels in this screen. 

Security > Firewall > Default Action

Packet Direction

This is the direction of travel of packets (WAN to LAN, LAN to WAN, WAN to Router, 
LAN to Router).

Firewall rules are grouped based on the direction of travel of packets to which they apply. 
For example, LAN to Router means packets traveling from a computer/subnet on the 
LAN to the Device itself. 

Default Action

Use the drop-down list boxes to select the default action that the firewall is to take on 
packets that are traveling in the selected direction and do not match any of the firewall 
rules. 

Select Drop to silently discard the packets without sending a TCP reset packet or an ICMP 
destination-unreachable message to the sender.

Select Reject to deny the packets and send a TCP reset packet (for a TCP packet) or an 
ICMP destination-unreachable message (for a UDP packet) to the sender.

Select Permit to allow the passage of the packets.

Apply

Click this to save your changes.

Cancel

Click this to restore your previously saved settings.

Security > Firewall > Rules

Firewall Rules Storage 
Space in Use

This read-only bar shows how much of the Device's memory for recording firewall 
rules it is currently using. When you are using 80% or less of the storage space, the 
bar is green. When the amount of space used is over 80%, the bar is red.

Packet Direction

Use the drop-down list box to select a direction of travel of packets for which you 
want to configure firewall rules.