DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

David Pentland — Thu, 18 Mar 2010 12:12:45 GMT

... in our case, it could simply be that Windows Vista and 7 do not respect the DHCP option 135 "Domain suffix search order" which we have set in our DHCP, whereas Windows XP always has?

See: http://www.winvistatips.com/domain-suffix-search-order-t727032.html

David.

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

David Pentland — Thu, 18 Mar 2010 12:02:22 GMT

Thanks for the pointer.

In our case, 'ping <host>' on Windows XP was working fine, but on Windows 7 was giving 'Unknown host'. I could explicitly ping '<host>.y.ac.uk' though.

"ipconfig /all" on Win XP showed 'DNS Suffix Search List' = "x.y.ac.uk, y.ac.uk, ac.uk" but same on Windows 7 only showed "x.y.ac.uk" although both OS get thier IP in same way from our MS DHCP.

None of the "DNS Client" GP settings such as the one you mentioned above or the '...Suffix Devlolution' one worked for us but setting GP "Computer Configuration -> Administrative Templates -> Network -> DNS Client -> DNS Suffix Search List" to "x.y.ac.uk, y.ac.uk, ac.uk" fixed it. "ipconfig /all" DNS Suffix display now matches our Win XP one, and 'ping <host>' now works fine on 7.

Still unclear where XP is getting its suffix search list from and why 7 is not getting same, but at least I can now make 7 work using this GP setting.

David.

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

Radacan — Mon, 16 Nov 2009 13:09:16 GMT

I could'nt understand why my XP PC's could resolve my internal owa domian name, but the Vista business machines couldn't find the site by name. Thanks VERY much, very useful info. problem now sorted.

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

mikemillerfl — Tue, 10 Nov 2009 02:04:51 GMT

Hello,

With windows server 2008 and Windows 7, does DHCP now have the ability to push dns suffix search lists instead of using GPO's?

Thank you,

Mike

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

güvenlik sistemleri — Tue, 11 Aug 2009 11:51:45 GMT

windows xp explained what I did something very nice thank you

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

Sneh — Sat, 08 Aug 2009 05:18:04 GMT

Stefan: Please try rebooting the XP machine and see if that helps

Also how are you checking that the XP machine is appending the suffix list?

Please do not use nslookup as a test.

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

stefanbuffalo — Sun, 21 Jun 2009 23:44:39 GMT

I put the registry entry with DWORD=0 into Win XP Pro, however it seems that the DNS suffix search list is still being traversed to append DNS suffixes. Do you have any futher info to turn this off?

Thnx.

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

Michael Schell — Fri, 08 May 2009 20:55:53 GMT

I imagine it's to speed up negative name resolution by discarding queries that are very unlikely to produce a positive response (appending the search list to a name that's already multi-label).

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

Andrew — Fri, 17 Apr 2009 20:53:19 GMT

That's an interesting tidbit, but can anyone put this in context and explain the reason for the change between XP and Vista?

re: DNS Client Name Resolution behavior in Windows Vista vs. Windows XP

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