Chapter 13 Firewall
P-661HNU-Fx User’s Guide
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Note: These rules specify which computers on the LAN can access which computers
or services on the WAN.
Figure 84 Security > Firewall > Services
Each field is described in the following table.
Table 49 Security > Firewall > Services
LABEL DESCRIPTION
LAN-to-WAN
Services
Blocking
Select Enable to activate service blocking.
Available
Services
This is a list of pre-defined services (destination ports) you may prohibit
your LAN computers from using. Select the port you want to block, and
click Add to add the port to the Blocked Services field.
A custom port is a service that is not available in the pre-defined
Available Services list. You must define it using the Type and Port
Number fields. See Appendix E on page 359 for some examples of
services.
Blocked
Services
This is a list of services (ports) that are inaccessible to computers on
your LAN when service blocking is effective. To remove a service from
this list, select the service, and click Delete.
Type
Select TCP, UDP or TCP and UDP, based on which one the custom port
uses.
Port Number Enter the range of port numbers that defines the service. For example,
suppose you want to define the Gnutella service. Select TCP type and
enter a port range of 6345-6349.
Add
Click this to add the selected service in Available Services to the
Blocked Services list. Note that the service is blocked immediately
after clicking this.
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