Tag Archives: website

Webdav.dll – Pre Service Pack 2 Revision History for Windows 7 SP1, Windows Server 2008 R2 SP1 and Windows Small Business Server 2011 (SBS 2011)

Webdav.dll – Pre Service Pack 2 Revision History for Windows 7 SP1, Windows Server 2008 R2 SP1 and Windows Small Business Server 2011 (SBS 2011)

04-Nov-2011 – 7.5.7601.21854 – Webdav.dll – x86/x64 – http://support.microsoft.com/kb/2618752 – FIX: WebDAV deletes a file instead of sending an “Access Denied” message

20-Oct-2011 – 7.5.7601.21843 – Webdav.dll – x86/x64 – http://support.microsoft.com/kb/2593591 – FIX: A hotfix is available that enables WebDAV to store the properties of file resources by using NTFS alternate data streams in IIS 7.5

02-Aug-2011 – 7.5.7601.21782 – Webdav.dll – x86/x64 – http://support.microsoft.com/kb/2503820 – FIX: Memory leak in the W3wp.exe process for a WebDAV website when many WebDAV clients upload files, download files, or access file directories in WebDAV 7.5

HTTP and HTTPS requests or traffic to a Windows Vista, Windows 7, Windows Server 2008, SBS 2008, Windows Server 2008 R2 or SBS 2011 machine may exhibit increased latency if the connection is through a network load balancer

If you utilise Microsoft Internet Information Services IIS or an application that uses the System.Net.HttpListener class is installed or running on one the operating systems below, and you have a Network Load Balancer then you may find that Increased latency occurs on HTTP and HTTPS requests and traffic.

This issue occurs because the HTTP and HTTPS requests from clients can include zero length data in the SSL records, certain server-side variables do not update correctly in this instance and Http.sys leaves the connection in the CLOSE_WAIT state.  This intern exhausts the open connection limit can introduce latency, timeouts and connection problems.

Affected Operating Systems:

Microsoft Windows Vista

Microsoft Windows 7

Microsoft Windows Server 2008

Microsoft Small Business Server 2008 – SBS 2008

Microsoft Windows Server 2008 R2

Microsoft Small Business Server 2011 – SBS 2011

The Microsoft Knowledge Base Article KB 2634328 includes further information on this issue and provides an updated version of Http.sys that corrects the issue http://support.microsoft.com/kb/2634328