Chapter 20 Firewall
VMG/EMG/AM/DM/GM Series User’s Guide
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20.5 Access Control (Rules)
An Access Control List (ACL) rule is a manually-defined rule that can accept, reject, or drop incoming or
outgoing packets from your network. This screen displays a list of the configured incoming or outgoing
filtering rules. Note the order in which the rules are listed. Click Security > Firewall > Access Control to
display the following screen.
Note: The ordering of your rules is very important as rules are applied in turn.
Figure 197 Security > Firewall > Access Control
The following table describes the labels in this screen.
Table 112 Security > Firewall > Access Control
LABEL DESCRIPTION
Rules Storage Space
Usage
This read-only bar shows how much of the Zyxel Device's memory is in use for recording
firewall rules. 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.
Add New ACL Rule Select an index number and click Add New ACL Rule 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.
# This field displays the rule index number. The ordering of your rules is important as rules are
applied in turn.
Status This field displays the status of the ACL rule. A yellow bulb signifies that this ACL rule is
active, while a gray bulb signifies that this ACL rule is not active.
Name This field displays the rule name.
Src IP This field displays the source IP addresses to which this rule applies.
Dest IP This field displays the destination IP addresses to which this rule applies.
Service This field displays the protocol (All, TCP, UDP, TCP/UDP, ICMP, ICMPv6, or any) used to
transport the packets for which you want to apply the rule.
Action 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 allow the passage of (Accept) packets that match this rule.
Modify Click the Edit icon to edit the firewall rule.
Click the Delete icon to delete an existing firewall rule.
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