ZyXEL Communications P-661HW Series User Manual

P-661H/HW Series User’s Guide

164

Chapter 9 Firewall Configuration

The following table describes the labels in this screen. 

 for more information. 

Table 61   Firewall Rules

Firewall Rules 

Storage Space 

in Use

This read-only bar shows how much of the ZyXEL 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 blue. 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.

Create a new 

rule after rule 

number 

Select an index number and click Add to add a new firewall rule after the selected 

index number. For example, if you select “6”, your new rule becomes number 7 and 

the previous rule 7 (if there is one) becomes rule 8.

The following read-only fields summarize the rules you have created that apply to 

traffic traveling in the selected packet direction. The firewall rules that you configure 

(summarized below) take priority over the default actions in the General screen.

#

This is your firewall rule number. The ordering of your rules is important as rules are 

applied in turn. 

Active

This field displays whether a firewall is turned on or not. Select the check box to 

enable the rule. Clear the check box to disable the rule.

Source IP

This drop-down list box displays the source addresses or ranges of addresses to 

which this firewall rule applies. Please note that a blank source or destination 

address is equivalent to Any.

Destination IP

This drop-down list box displays the destination addresses or ranges of addresses to 

which this firewall rule applies. Please note that a blank source or destination 

address is equivalent to Any.

Service 

This drop-down list box displays the services to which this firewall rule applies. See 

 for more information.

Action

This field displays whether the firewall silently discards packets (Drop), discards 

packets and sends a TCP reset packet or an ICMP destination-unreachable 

message to the sender (Reject) or allows the passage of packets (Permit).

Schedule

This field tells you whether a schedule is specified (Yes) or not (No).

Log

This field shows you whether a log is created when packets match this rule (Yes) or 

not (No).

Modify

Click the Edit icon to go to the screen where you can edit the rule.
Click the Remove icon to delete an existing firewall rule. A window displays asking 

you to confirm that you want to delete the firewall rule. Note that subsequent firewall 

rules move up by one when you take this action.

Order

Click the Move icon to display the Move the rule to field. Type a number in the Move 

the rule to field and click the Move button to move the rule to the number that you 

typed. The ordering of your rules is important as they are applied in order of their 

numbering.

Apply

Click Apply to save your changes back to the ZyXEL Device.

Cancel

Click Cancel to begin configuring this screen afresh.