IIS Server Audit Event: 2261

IIS Server Log Analysis Tool

EventLog Analyzer is a comprehensive tool to audit, manage and track your Microsoft Internet Information Services (IIS) server logs and provide you with crucial insights into file and web servers. This reporting tool has out-of-box support for both IIS web server and IIS FTP log server logs and provides in-depth reports that help you to enhance the productivity of your organization and seamless access.

IIS » 2261: W3 message read raw not supported

2261: W3 message read raw not supported

The IIS Internet Server Application Programming Interface (ISAPI) extensions and filters can extend and modify the request-processing capabilities of IIS. ISAPI applications are run in isolation to enhance server stability.   

Event 2261 is generated when an attempt was made to load a particular filter, but it requires the SF_NOTIFY_READ_RAW_DATA filter notification and this notification is not supported in this IIS version.  

How could you resolve this situation?

IIS 7.0 does not support the SF_NOTIFY_READ_RAW_DATA notification for ISAPI filters. If you have to use an ISAPI Filter that requires this notification, you must run the filter on IIS 6.0 in IIS 5.0 isolation mode.  

We can help you simplify log management and improve your organization's security with EventLog Analyzer.

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