vb.net 2d barcode free Configuring Windows Firewall and IPsec in Visual C#

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CHapTER 26 Configuring Windows Firewall and IPsec
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The pfirewall.log file is stored by default at %Windir%\System32\Logfiles\Firewall \pfirewall.log, but this location is configurable. Note, however, that if you specify a location other than the default, you must ensure that the Windows Firewall service has permissions to write to that location. To grant Write permissions for the log folder to the Windows Firewall service, perform the following steps:
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1 . Locate the folder that you specified for the logging file, right-click it, and then
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2. Click the Security tab, and then click Edit. 3. Click add, and then, in Enter Object Names To Select, type NT SERVICE\mpssvc
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4. In the permissions dialog box, verify that MpsSvc has Write access, and then click
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TROUBLESHOOTING WINDOWS FIREWaLL USING EVENT LOGS
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You can use the Windows event logs to monitor Windows Firewall and IPsec activity and to troubleshoot issues that may arise . The event logs for Windows Firewall are found under the following location in Event Viewer: Applications and Services Logs\Microsoft\Windows\Windows Firewall With Advanced Security As shown in Figure 26-18, there are four event logs you can use for monitoring and troubleshooting Windows Firewall activity:
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ConnectionSecurity ConnectionSecurityVerbose Firewall FirewallVerbose
The two verbose logs are disabled by default because of the large amounts of information they collect . To enable these logs, right-click them and select Enable Log .
Managing Windows Firewall with Advanced Security
CHapTER 26
FIgURE 26-18 Using the event logs for Windows Firewall with Advanced Security
For more information on working with event logs, see 21, Maintaining Desktop Health . See also Windows Firewall with Advanced Security Troubleshooting Guide: Diagnostics and Tools in the TechNet Library at http://technet.microsoft.com/en-us/library /cc722062.aspx .
TROUBLESHOOTING WINDOWS FIREWaLL USING aUDITING
You can use auditing to monitor Windows Firewall and IPsec activity and to troubleshoot issues that may arise . Auditing events for Windows Firewall and IPsec activity are written to the Security Event Log and have Event IDs in the range 4600 to 5500 . Auditing for Windows Firewall and IPsec activity can be enabled on targeted computers in two ways:
Using Group Policy Using the Auditpol .exe command
To configure auditing for Windows Firewall and IPsec activity using Group Policy, use the audit policy subcategories found under the following location: Computer Configuration\Policies\Windows Settings\Security Settings\Advanced Audit Policy Configuration\Audit Policies
CHapTER 26 Configuring Windows Firewall and IPsec
Figure 26-19 shows the audit policy subcategories available under this policy node . The audit policy subcategories relevant for Advanced Audit Policy Configuration are as follows:
Logon/Logoff
IPsec Main Mode IPsec Quick Mode IPsec Extended Mode
Object Access
Filtering Platform packet drop Filtering Platform connection
Policy Change
MPSSVC rule-level policy change Filtering Platform policy change
System
IPsec Driver Other system events
FIgURE 26-19 Using Group Policy to audit Windows Firewall and IPsec activity
Managing Windows Firewall with Advanced Security
CHapTER 26
To list all audit policy subcategories from the command line, type auditpol /list /subcategory:* at an administrative-level command prompt . To use Auditpol .exe to enable auditing for Windows Firewall activity, type the following command .
auditpol.exe /set /SubCategory:"MPSSVC rule-level Policy Change","Filtering Platform policy change","Other System Events","Filtering Platform Packet Drop","Filtering Platform Connection" /success:enable /failure:enable
To use Auditpol .exe to enable auditing for IPsec activity, type the following command .
auditpol.exe /set /SubCategory:"MPSSVC rule-level Policy Change","Filtering Platform policy change","IPsec Main Mode","IPsec Quick Mode","IPsec Extended Mode","IPsec Driver","Other System Events","Filtering Platform Packet Drop","Filtering Platform Connection" /success:enable /failure:enable
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Enabling auditing for Windows Firewall and Ipsec activity can generate a
large number of events in the Security Event Log, so be sure to enable it only when actively collecting troubleshooting information.
TROUBLESHOOTING IpSEC ISSUES USING NETSH WFp
New in Windows 7 is the netsh wfp command context, which can be used for advanced troubleshooting of IPsec issues in conjunction with Microsoft Customer Support Services (CSS) . This new Netsh context replaces the Microsoft IPsec Diagnostic Tool (Wfputil .exe), which can be obtained for previous versions of Windows from the Microsoft Download Center . To use netsh wfp for troubleshooting an IPsec communications issue that you are experiencing on a computer, follow these steps:
1. 2. 3.
Type netsh wfp capture start at a command prompt to begin capturing real-time IPsec diagnostic information on the computer . Reproduce the IPsec communications problem you have been experiencing on the computer . Type netsh wfp capture stop to stop tracing .
The result of performing these steps is a WfpDiag .cab file located in the current directory from which the command was run . This .cab file contains an Event Trace Log (ETL) file named WfpDiag .etl and a corresponding Extensible Markup Language (XML) file named WfpDiag . xml, which contain detailed information collected during the trace . Once you have collected this information, you can send it to Microsoft support personnel, who can decode the information and help you troubleshoot your issue .
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