ZyXEL Communications P-2612HNU-Fx User Manual page 205

Note: These rules specify which computers on the LAN can access which computers
or services on the WAN.
Figure 70 Security > Firewall
Each field is described in the following table.
Table 54 Security > Firewall
LABEL
Enable LAN-to-
WAN Services
Blocking
Available
Services
Blocked
Services
Type
Port Number
P-2612HNU-Fx User's Guide
DESCRIPTION
Select this to activate service blocking.
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 369
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.
Select TCP, UDP or TCP and UDP, based on which one the custom
port uses.
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.
Chapter 14 Firewall
for some examples of
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