3Com 3CRWE554G72T User Guide - Page 78

78 CHAPTER 5: ROUTER CONFIGURATION To use access control for all computers: 1 Click PCs access authorized services only. 2 Select All PCs to set up the access rights for all computers connected to the Router. The screen shown in Figure 59 displays. Figure 59 All PCs Setup Screen 3 If required, check the Bypass URL Filter check box to override the URL Filter settings. Refer to "URL Filter" on page 80. 4 Select the authorized services by clicking in the appropriate check box(es). 5 In addition to the four authorized services listed, you can choose to allow or block access to other services. You can either: ■ Allow all other services, or allow all other services with exceptions, or ■ Block all other services, or block all other services with exceptions. To do this, select Allow or Block from the drop down menu and, if required, enter the exceptions into the text box. The port numbers are specified using a comma-separated list, with hyphens to denote port number ranges. So for example, entering 2, 3, 5-7 would cause ports 2, 3, 5, 6, and 7 to be activated. For example, to block access to all services except Web (80) and a service that uses ports 2,3,5,6 and 7: 1. Tick the Web(80) check box. 2. Select 'Block' all other services. 3. Enter '2, 3, 5-7' in the 'except (specify ports) box. See Figure 59. 6 If required, you can schedule when PCs can access the Internet. By default, all PCs can access the internet all day, every day. To change the