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Wireless networks add a whole level of additional security headaches for techs to face, as you know from 16, Maintaining and Troubleshooting Networks Some of the points to remember or to go back and look up are as follows:
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Set up wireless encryption at least WEP, but preferably WPA or the more secure WPA2 and configure clients to use them Disable DHCP and require your wireless clients to use a static IP address
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If you need to use DHCP, only allot enough DHCP addresses to meet the needs of your network to avoid unused wireless connections Change the WAP s SSID from default and disable SSID broadcast Filter by MAC address to allow only known clients on the network Change the default user name and password Every hacker has memorized the default user names and passwords Update the firmware as needed If available, make sure the WAP s firewall settings are turned on
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Reporting
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As a final weapon in your security arsenal, you need to report any security issues so a network administrator or technician can take steps to make them go away You can set up two tools within Windows so that the OS reports problems to you: Event Viewer and Auditing You can then do your work and report those problems Let s take a look
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Event Viewer is Window s default tattletale program, spilling the beans about many things that happen on the system You can find Event Viewer in Administrative Tools in the Control Panel By default, Event Viewer has three sections, Application, Security, and System, and if you ve downloaded Internet Explorer 7, you ll see a fourth option for the browser, Internet Explorer (Figure 1830) As you ll recall from 11, the most
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18: Computer Security
Figure 1830
Event Viewer
common use for Event Viewer is to view application or system errors for troubleshooting (Figure 1831) One very cool feature of Event Viewer is that you can click the link to take you to the online Help and Support Center at Microsoftcom, and the software reports your error (Figure 1832), checks the online database, and comes back with a more or less useful explanation (Figure 1833)
Figure 1831
Typical application error message
Mike Meyers CompTIA A+ Guide: PC Technician (Exams 220-602, 220-603, & 220-604)
Auditing
The Security section of Event Viewer doesn t show you anything by default To unlock the full potential of Event Viewer, you need to set up auditing Auditing in the security sense means to tell Windows to create an entry in the Security Log when certain events happen, for example, a user logs on called event auditing or tries to access a certain file or folder called object access auditing Figure 1834 shows Event Viewer tracking logon and logoff events The CompTIA A+ certification exams don t test you on creating a brilliant auditing policy for your office that s what network administrators do You simply need to know what auditing does and how to turn it on or off so that you can provide support for the network administrators in the field To turn on auditing at a local level, go to Local Security Settings in Administrative Tools Select Local Policies and then click Audit Policies Double-click one of the policy options and select one or both of the
Figure 1832
Details about to be sent
Figure 1833
Help and Support Center being helpful
18: Computer Security
checkboxes Figure 1835 shows the Audit object access dialog box
Incidence Reporting
Once you ve gathered data about a particular system or you ve dealt with a computer or network problem, you need to complete the mission by telling your supervisor This is called incidence reporting Many companies have premade forms that you simply fill out and submit Other places are less formal Regardless, you need to do this! Incidence reporting does a couple of things for you First, it provides a record of work you ve done and accomplished Second, it provides a piece of information that, when combined with other inEvent Viewer displaying security alerts formation that you might or might not know, reveals a pattern or bigger problem to someone higher up the chain A seemingly innocuous security audit report, for example, might match other such events in numerous places in the building at the same time and thus show conscious, coordinated action rather than a glitch was at work
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