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Windows Server® 2008 Networking and Network Access Protection (NAP) by Microsoft Networking Team, Tony Northrup, Joseph Davies

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Troubleshooting

Windows Firewall problems typically take the form of a connectivity failure. In other words, a user will be unable to connect to a server. Unfortunately, connectivity failures can be caused by many different factors. When troubleshooting connectivity problems, begin by determining whether Windows Firewall is the root cause of the problem.

Especially when IPsec is newly deployed, administrators assume that general connectivity problems are actually caused by IPsec. If you have created an ICMP exemption (as described in Configuring an Exemption for ICMP earlier in this chapter), you can ping the client and server to verify connectivity. Next, use the Windows Firewall With Advanced Security monitoring features to determine whether ...

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