ZyXEL Communications ARMOR G1, User Manual

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Chapter 12 Security
NBG6818 User’s Guide
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Figure 73 Settings > Firewall > IPv4 Firewall
The following table describes the labels in this screen.
Table 42 Settings > Firewall > IPv4 Firewall
LABEL DESCRIPTION
ICMP Internet Control Message Protocol is a message control and error-reporting protocol between
a host server and a gateway to the Internet. ICMP uses Internet Protocol (IP) datagrams, but
the messages are processed by the TCP/IP software and directly apparent to the application
user.
Respond to Ping
on The NBG6818 will not respond to any incoming Ping requests when None is selected. Select
LAN to reply to incoming LAN Ping requests. Select WAN to reply to incoming WAN Ping
requests. Otherwise select LAN&WAN to reply to all incoming LAN and WAN Ping requests.
Firewall Setup
Enable Firewall Select Enable to activate the firewall. The NBG6818 performs access control and protects
against Denial of Service (DoS) attacks when the firewall is activated.
Enable Firewall Rule
Filter Rule Select Enable to activate the firewall rules that you define (see Add Firewall Rule below).
Actions Select Drop to silently discard the packets which meet the firewall rules. The others are
accepted.
Select Accept to allow the passage of the packets which meet the firewall rules. The others
are blocked.
Firewall Rule
No. This is your firewall rule number. The ordering of your rules is important as rules are applied in
turn.
Service Name This is a name that identifies or describes the firewall rule.
MAC address This is the MAC address of the computer for which the firewall rule applies.