ZyXEL NBG2105 User Guide - Page 100

Chapter 14 Firewall 5 For local services that are enabled, protect against misuse. Protect by configuring the services to communicate only with specific peers, and protect by configuring rules to block packets for the services at specific interfaces. 6 Keep the NBG2105 in a secured (locked) room. 14.4 Port Filtering Screen Click Firewall > Port Filtering to apply filtering based on UDP or TCP port numbers. Figure 62 Firewall > Port Filtering The following table describes the labels in this screen. Table 51 Firewall > Port Filtering LABEL DESCRIPTION Enable Port Filtering Click this to apply filtering based on UDP or TCP port numbers. Port Range Enter the port number or range of ports that define the traffic type. For example TCP port 80 defines web traffic. Protocol Select TCP to filter on TCP ports, UDP to filter on UDP ports or Both to filter on both TCP and UDP ports. Comment Enter a description of this rule. Apply Changes Click this to save changes back to the NBG2105. Reset Click this to begin configuring this screen afresh. Current Filter Table Port Range This shows the port number or range of ports that define the traffic type. For example TCP port 80 defines web traffic. Protocol This shows TCP for TCP port filtering, UDP for UDP port filtering or Both for TCP and UDP port filtering. Comment Enter a description of this rule. Select Click this to select this rule. Delete Selected Click this to delete the selected rules. Delete All Click this to delete all rules. Reset Click this to reset all selections. 100 NBG2105 User's Guide