ZyXEL Communications NBG410W3G Series User Manual

 Chapter 9 Firewall

NBG410W3G Series User’s Guide

Click SECURITY > FIREWALL > Rule Summary to open the screen. This screen displays 
a list of the configured firewall rules.

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The ordering of your rules is very important as rules are applied in the order 
that they are listed.

See 

 for more information about the firewall.

From, To

The firewall rules are grouped by the direction of packet travel. This displays the 

number of rules for each packet direction. Click the edit icon to go to a summary 

screen of the rules for that packet direction.
Here is an example description of the directions of travel.
From LAN To LAN means packets traveling from a computer on one LAN subnet to 

a computer on another LAN subnet on the LAN interface of the ZyXEL Device or the 

ZyXEL Device itself. The ZyXEL Device does not apply the firewall to packets 

traveling from a LAN computer to another LAN computer on the same subnet.
Use the drop-down list box to set the firewall’s default actions based on the direction 

of travel of packets. 
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. 

Log

Select the check box next to a direction of packet travel to create a log when the 

above action is taken for packets that are traveling in that direction and do not match 

any of your customized rules.

Apply

Click Apply to save your changes.

Reset

Click Reset to begin configuring this screen afresh.

Table 42   SECURITY > FIREWALL > Default Rule  (continued)