NETGEAR DGFV338 ProSafe Reference Manual page 93

DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
Although the DGFV338 already holds a list of many service port numbers, you are not limited to
these choices. Use the Services menu to add additional services and applications to the list for use
in defining firewall rules. The Services menu shows a list of services that you have defined, as
shown in Figure 4-13.
To define a new service, you must first determine which port number or range of numbers is used
by the application. This information can usually be determined by contacting the publisher of the
application or from user groups or newsgroups. When you have the port number information, you
can enter it on the Services screen. You can configure up to 125 custom services.
To add a custom service:
1. Select Security from the main menu and Services from the submenu. The Services screen will
display.
Figure 4-13
2. In the Add Custom Services section, enter a descriptive name for the service (this name is for
your convenience).
3. Select the Layer 3 transport protocol of the service: TCP, UDP, or ICMP.
4. For TCP or UDP services, enter the first port of the range that the service uses. For ICMP
sevices, enter the ICMP Type number.
5. For TCP or UDP services, enter the last port of the range that the service uses. If the service
only uses a single port number, enter the same number in both fields.
6. Click Add.
The new service will now appear in the Custom Services Table.
Security and Firewall Protection
v1.0, May 2008
4-17