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C H A P T E R 6 R EVIEWING LOGS AND MONITORING
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The Event Viewer is helpful for researching events that have already occurred on your system. But it doesn t go into detail about all the processes currently running on your system. The Task Manager in Windows is similar to the Activity Monitor on a Mac and will provide you with the ability to look (see Figure 6-6) at what processes are currently running.
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Figure 6-6. Task Manager To see the Task Manager, press the Ctrl+Alt+Del keys on your keyboard, and click the button for Task Manager. Here you will see a few tabs. The first is Applications, which contains applications that your account has launched. The second is Processes, which contains the applications you have launched and any background processes that might be running, as well as the user who started the process and the CPU and memory being taken up by that application. You can use the Performance tab to check memory and processor utilization and get a chart that shows this. To stop a process that is running, you can right-click it and click End Process. To find out more about a process, then consider using Google or the Microsoft Knowledge Base at http:// www.microsoft.com/support to research what each process is doing on the system.
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Note You can use the Networking tab to view the network traffic running on your network interfaces.
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You can use the Performance administrative tool (see Figure 6-7) to customize the amount of information that is being logged and to provide you with extremely detailed information about nearly every aspect of how your system is running. This tool is far more advanced than those available on the Mac platform for tracking down bottlenecks in speed, levels of inbound traffic, and other items that could introduce security issues. A comprehensive discussion about this tool is beyond the scope of this book but should definitely be consulted when trying to troubleshoot why the Windows environment on your computer is running poorly.
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Figure 6-7. Performance counters
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Reviewing logs is an integral aspect of security, and you should review them routinely. If you are the only person responsible for looking at logs, set up a recurring event in your calendar program to remind you to do this. This might be daily, weekly, or monthly according to how concerned your organization is about the health and security of your system coupled with how complex your environment is.
Accountability
Establishing some form of accountability is also important. Have you ever gone to the bathroom in a gas station where it has a sign-in sheet for the attendants to mark when cleaning the bathroom
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If there wasn t a sign-in sheet for cleaning the bathroom at a gas station, it might never get cleaned. Likewise, unless you establish some form of accountability, you will likely run into a situation where your logs haven t been checked in months, especially if you are dealing with multiple people in charge of log checking. Using a spreadsheet or a sign-in sheet to indicate when log files have been reviewed is an excellent way to establish accountability for log checking. You can also track when logs are backed up to optical media if you choose to do so. The following are the items to include in your regularly scheduled log reviews: When were the periodic maintenance scripts (daily, weekly, and monthly) last run You can easily find this using ls l /var/log/*.out to see when their log files were last updated. Was there anything out of the ordinary in those logs Look for repeated bad password attempts in the log for any service that accepts a network connection, such as the smb.log file if there are Windows computers on your network or ftp.log if you are sharing files through FTP. Look for any bad password attempts, and check the privilege escalations in secure.log. Review the history command to check for strange commands and the last command to look for weird user logins. If you re running Parallels or Bootcamp, check your Windows Event Viewer. The access.log file in the /var/log /cups/access_log folder shows all the CUPS activity on your print server. The logs located in the /var/log/samba directory deal with access attempts from Windows computers.
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