Chapter 19 Firewall
NBG-419N User’s Guide 165
See Appendix E on page 281 for commonly used services and port numbers.
Dest IP Address Enter the IP address of the computer to which traffic for the application
or service is entering.
The NBG-419N 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 NBG-419N applies the firewall rule to traffic initiating from this
computer.
Protocol Select the protocol (TCP, UDP, ICMP or None) used to transport the
packets for which you want to apply the firewall rule.
Dest Port Range Enter the port number/range of the destination that define the traffic
type, for example TCP port 80 defines web traffic.
Source Port
Range
Enter the port number/range of the source that define the traffic type,
for example TCP port 80 defines web traffic.
Add Rule Click Add to save the firewall rule.
Firewall Rule
#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.
Dest IP Address This is the IP address of the computer to which traffic for the application
or service is entering.
Source IP
Address
This is the IP address of the computer from which traffic for the
application or service is initialized.
Protocol This is the protocol (TCP, UDP, ICMP or None) 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.
Action Drop - Traffic matching the conditions of the firewall rule are stopped.
Delete Click this to remove the firewall rule.
Reset Click Reset to start configuring this screen again.
Table 64 Security > Firewall > ServicesLABEL DESCRIPTION