Instructions

Chapter 13 Security
NBG6604 User’s Guide
89
13.2 IPv4 Firewall Screen
Use this screen to enable or disable the NBG6604’s IPv4 firewall, and set up firewall logs. Click Security >
IPv4 Firewall to open the firewall setup screen.
Figure 56 Security > IPv4 Firewall
The following table describes the labels in this screen.
Table 34 Security > 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 NBG6604 will not respond to any incoming Ping requests when Disable 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 this check box to activate the firewall. The NBG6604 performs access control and
protects against Denial of Service (DoS) attacks when the firewall is activated.
Enable Firewall Rule
Enable Firewall
Rule
Select this check box to activate the firewall rules that you define (see Add Firewall Rule
below).
Filter table type 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.
Add Firewall Rule
Service Name Enter a name that identifies or describes the firewall rule.
MAC Address Enter the MAC address of the computer for which the firewall rule applies.
Dest IP Address Enter the IP address of the computer to which traffic for the application or service is entering.
The NBG6604 applies the firewall rule to traffic initiating from this computer.
Source IP Address Enter the IP address of the computer that initializes traffic for the application or service.
The NBG6604 applies the firewall rule to traffic initiating from this computer.
Protocol Select the protocol (TCP, UDP, or ICMP) used to transport the packets for which you want to
apply the firewall rule.
Dest Port Range This is the port number/range of the destination that define the traffic type, for example TCP
port 80 defines web traffic.
Source Port Range This is the port number/range of the source that define the traffic type, for example TCP port
80 defines web traffic.
Add Rule Click Add Rule to save the firewall rule.
Firewall Rule