I'm running SBS2011 Standard in a small office environment. The system has been running fine for about 6 months but has recently started to have problems connecting to Internet sites. A DCDIAG /TEST:DNS gives the following error: PTR record query for the 1.0.0.127.in-addr.arpa. failed on the DNS server Re running the Connect to Internet Wizard resolves the problem for the next 24-48 hours but I would like to understand what is wrong and how I can fix it please.

Seems to be an issue with Root Hints here. Refer below links. http://www.techexams.net/forums/off-topic/50694-weird-alert.html http://www.winvistatips.com/re-dcdiag-test-dns-forwarders-reported-invalid-t696160.html http://www.techtalkz.com/windows-server-2003/122260-how-resolve-error-root-hints-list-has-invalid-root-hint-ser.html Regards, _Prashant_MCSA|MCITP SA|Microsoft Exchange 2003 Blog - http://prashant1987.wordpress.com Disclaimer: This posting is provided AS-IS with no warranties/guarantees and confers no rights. Email-giteepag@yahoo.co.in

Hello, I would agree with Prashant since it seems an issue with Root Hints. You can bypass the use of Root Hints by configuring DNS forwarders. Also, I would going using forwarders because it uses recursive queries instead of iterative ones. For SBS questions, ask them here: http://social.technet.microsoft.com/Forums/en-US/category/sbsserver This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified Technology Specialist: Designing and Providing Volume Licensing Solutions to Large Organizations Microsoft Certified IT Professional: Enterprise Administrator Microsoft Certified IT Professional: Server Administrator Microsoft Certified Trainer