TAILIEUCHUNG - MCSE ISA Server 2000- P10

MCSE ISA Server 2000- P10: These books include a large amount and different kinds of information. The many different elements are designed to help you identify information by its purpose and importance to the exam and also to provide you with varied ways to learn the material. | Chapter 8 DIAL-UP CONNECTIONS AND RRAS 243 Managing and Limiting ISA Dial-Up Connections After you configure ISA Server for dial-on-demand connections you might want to limit ISA Server connections. Remember that you have the same options for controlling these connections as any others. You can restrict user s access to sites reduce available hours for connection and so on. Several tips for managing and restricting dial-up connections are shown in Table . TABLE Managing and Restricting Dial-Up Connections Desired Limit the time a user can use dial out Prevent unnecessary Internet dial-up Limit active caching Action Web access Create a schedule for the time to deny or allow Internet access then create a site and content rule using that schedule that denies or allows all access to the Internet. All requests Use this schedule in a protocol rule that denies access. List all internal servers in Local Domain Table to prevent Internet based DNS lookups. Active caching is configured on the Active Caching page of Cache Configuration properties. If active caching is configured dial-up occurs when it is necessary to refresh cache content. To reduce automatic recovery of cache refresh select Less Frequently see Figure . FIGURE Reducing active caching refresh. Troubleshooting ISA Server Dial-Up Connections Setup for dial-up connections for ISA Server is fairly simple nevertheless problems will occur. Table lists some potential trouble spots and what to do about them. 244 Part II CONFIGURING AND TROUBLESHOOTING ISA SERVER SERVICES TABLE ISA Server Dial-Up Connections Troubleshooting Problem Possible Cause Resolution The event Dial-on-Demand Failure is recorded in the event log. The connection could not be created because the line was busy or there is no answer. Determine why there is no answer or if the line was busy and make necessary changes. The event Invalid Dial-On-Demand Credentials is recorded in the event log. The credentials are not valid. Check .

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