ZyXEL Communications MAX-200M1 Series, User Manual

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ZyXEL MAX-200M1 Series User’s Guide
Chapter 12 Firewall 137
Figure 77 Security > Firewall > Services
Each field is described in the following table.
Table 43 Security > Firewall > Services
LABEL DESCRIPTION
Service Setup
Enable Services
Blocking
Select this to activate service blocking. The Schedule to Block section controls
what days and what times service blocking is actually effective, however.
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 F on page 249 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 or 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.
Delete Select a service in the Blocked Services , and click this to remove the service from
the list.