ZyXEL MAX-306 User Guide - Page 208
Technical Reference, 16.4.1 Stateful Inspection Firewall., Table 80
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Chapter 16 The Firewall Screens Table 80 TOOLS > Firewall > Service Setting (continued) LABEL DESCRIPTION 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. Clear All Click this to remove all the services in the Blocked Services list. Schedule to Block Day to Block Select which days of the week you want the service blocking to be effective. Time of Day to Block Select what time each day you want service blocking to be effective. Enter times in 24-hour format; for example, 3:00pm should be entered as 15:00. Apply Click to save your changes. Reset Click to restore your previously saved settings. 16.4 Technical Reference The following section contains additional technical information about the WiMAX Device features described in this chapter. 16.4.1 Stateful Inspection Firewall. Stateful inspection firewalls restrict access by screening data packets against defined access rules. They make access control decisions based on IP address and protocol. They also "inspect" the session data to assure the integrity of the connection and to adapt to dynamic protocols. These firewalls generally provide the best speed and transparency; however, they may lack the granular application level access control or caching that some proxies support. Firewalls, of one type or another, have become an integral part of standard security solutions for enterprises. 208 User's Guide