Solutions Through IT

February 16, 2011

Windows Server 2008 DNS Servers may fail to resolve queries for some top-level domains

Filed under: DNS, SBS 2008, Server 2008 — solutionsthroughit @ 08:22

SBS 08, Server 08 will not process DNS requests correctly typically after a day or more.  Some DNS resolution will work, however some top level domains (.co.uk, .cn, .br etc) will not work.  This link should resolve this issue.  Essentially, the fix is:

1.    Start Registry Editor (regedit.exe).
2.    Locate the following registry key:
3.    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters
4.    On the Edit menu, click New, click DWORD (32-bit) Value, and then add the following value:
Value: MaxCacheTTL
Data Type: DWORD
Data value: 0x2A300 (172800 seconds in decimal, or 2 days)
5.    Click OK.
6.    Quit Registry Editor.
7.    Restart the DNS Server service.

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