ZyXEL Communications P-661H Series - Manual (Page 164)

P-661H/HW Series User’s Guide
164 Chapter 9 Firewall Configuration
The following table describes the labels in this screen.
9.7.1 Configuring Firewall Rules
Refer to Section 8.1 on page 145 for more information.
Table 61 Firewall Rules
LABEL DESCRIPTION
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
Section 9.9 on page 172 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.