Tag Archives: drop

Microsoft, SBS 2008, Service Pack 2, Service Pack 2, Service Pack 2, Small Business Server 2008, Windows, Windows Server 2008

Dhcpssvc.dll – Pre Service Pack 3 Revision History for Windows Server 2008 SP2 and Windows Small Business Server 2008 (SBS 2008)

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Dhcpssvc.dll – Pre Service Pack 3 Revision History for Windows Server 2008 SP2 and Windows Small Business Server 2008 (SBS 2008)

14-Dec-2011 – 6.0.6002.22755 – Dhcpssvc.dll – x86/x64 – http://support.microsoft.com/kb/2632816 – A Windows Server 2008 R2-based or Windows Server 2008-based DHCP server cannot lease IP addresses if the server cannot reach any RWDCs in an Active Directory domain environment

09-Nov-2011 – 6.0.6002.22740 – Dhcpssvc.dll – x86/x64 – http://support.microsoft.com/kb/2616864 – DHCP Server service crashes randomly in Windows Server 2008 or in Windows Server 2008 R2

18-Jul-2011 – 6.0.6002.22681 – Dhcpssvc.dll – x86/x64 – http://support.microsoft.com/kb/2479424 – A Windows Server 2008 or Windows Server 2008 R2 NAP-enabled DHCP server incorrectly issues fully accessible IP addresses to Windows XP Service Pack 3 clients that are not NAP compliant

26-Jun-2009 – 6.0.6002.22158 – Dhcpssvc.dll – x86/x64 – http://support.microsoft.com/kb/972962 – A DHCPv6 server that is running Windows Server 2008 may drop the DHCP relay-forwarded packets if these packets contain some unknown options

Microsoft, SBS 2011, Service Pack 1, Service Pack 1, Small Business Server 2011, Windows 7, Windows Server 2008 R2

32 Bit Applications that utilise NetBIOS API do not receive connection close notifications in Windows 7 64 Bit Edition, Windows Server 2008 R2 or Windows Small Business Server 2011

32 bit applications that utilise NetBIOS API do not receive connection close notifications in Windows 7 64 Bit Edition, Windows Server 2008 R2 or Windows Small Business Server 2011 and as a result they do not try to re-establish a session.  Restarting the application will re-establish the session and recover from the issue.

This issue occurs because when the Netbios.sys driver receives data the driver does not convert the Network Connection Block NCB structure from 64 bit to 32 bit when the session has been dropped.  A 32 bit application cannot understand the 64 bit NCB structure which is why the session cannot be re-established.

The Microsoft Knowledgebase article KB 2633667 provides further information on the issue and a Hotfix containing an updated version of the Netbios.sys driver that that corrects this particular issue http://support.microsoft.com/kb/2633667