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Windows 2008 Server Stops accepting connections from Windows 2003 Server.  Possible SMB compatibilty issues.

Last Modified: 2008-11-20
I am running a Windows 2003 Native Active Directory.  I recently installed a Windows 2008 Server.  I preped the forest, domain, and promoted the Windows 2008 server to a domain controller.  The Windows 2008 domain controller runs fine, but after a few hours or days, it stops accepting UNC request from pre Windows 2008 server.  If I try to map using UNC from a prep Windows 2008, it never responds and never errors out.  If I try to map from a Windows 2008 server, it responds without any problems.  When I reboot the Windows 2008 domain controller everything will work fine for a few hours or days and after that it will act up again.  There's no error messages in the application or system logs to point me in the correct direction.  I know this problem is somehow associated with SMB compatibility issues.  Windows 2008 uses SMB2 while Windows 2003 and older uses SMB1.  Any info in this matter is very much appreciated.  Thanks in advance.
Watch Question

Do you have Symantec Endpoint Installed??


I have Symantec Antivirus installed, but I do not have Symantec Endpoint installed.
Site Reliability Engineer
Most Valuable Expert 2011
This one is on us!
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For testing purposes, I will uninstall the antivirus and test.  If anybody else has any suggestions, please let me know.  I appreciate all the help thus far.
tigermattSite Reliability Engineer
Most Valuable Expert 2011

Please post back after a few days of testing :-)
Good luck


So far so good.  I will post back on 08-04-2008 with the results again.  Thanks in advance.


Ever since I uninstalled Syamntec AV, the problem has not occured.  For some apparent reason, Symantec AV and Windows 2008 doesn't like each other.  Thanks for all the help

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