WMI過濾器比賽-您是否是騎士在shining裝甲？
歡迎 「對聖潔桌面WMI過濾器的搜尋」， 這是一次全球性查尋什麼您可能叫「完善的桌面WMI過濾器". 通過使用WMI查詢語言的WMI過濾器(WQL)，應該能察覺仅臺式計算機。 它應該是一次一般詢問-的意思世界各地使用過濾器為小組政策過濾在多數活躍目錄環境應該是可能的。
So, what is a desktop really? 很好，我們實際上在這種情況下說它是膝上計算機的對面。 Hmm，然後什麼是膝上計算機？ 足够容易： 一臺計算機用電池! 我們有WMI過濾器為已經發現膝上計算機：
選擇*從Win32_Battery - 您是否正義不愛樸素在這次詢問？
這過濾器將做一臺計算機用電池反應與「真實」 (因為WMI類事例存在)，意味GPO用這過濾器將適用於計算機用電池。 簡單的權利？ 并且您也許認為「轉動它在附近」到發現桌面，像是容易的：
選擇*從Win32_Battery，可及性! = 2
或
選擇*從Win32_Battery，可及性不是空的
或
「不是X喜歡Y」或的地方什麼
可能它是，可能它不是… 我認為它是相當堅硬的! 為察覺膝上計算機我們可能測試了類Win32_PortableBattery， Win32_PCMCIAController， Win32_POTSModem -，但我莫名其妙地認為多數人將同意， 「根本鈴聲」，做膝上計算機一臺膝上計算機，實際上是電池存在!
但，我們的測試為察覺仅桌面(沒有電池的機器-是，我知道這太將包括服務器作為他們「固定式」)不是成功! 我們大概需要正確句法？ 并且這是您進入圖片的地方!
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在一份發送郵件列表所有開始的這為小組Group Policy宗師和最有價值球員和女孩-叫的GPTalk -創造和贍養的政策人Darren 3月Elia -人後邊 GPOguy.com 并且 SDM軟件. 您能加入名單 這裡 并且參加這場比賽 贏取贈送閱本 ：
GPExpert™查明故障樸
但您只必須是崩裂這件事的第一個人，那裡將是可能是您的一個優勝者-!
我評估接踵而來的答復- FIFO: " 首先首先 " method is used. Hopefully we'll see the most simple solution first - simplicity works, right? Actually I wouldn't know in this case would I...
One important thing! We will ask you kindly to TEST any WMI query submissions before sending them to everybody on the list. During your testing, you should use a tool to verify the WMI filter against a minimum of 2 desktops and 2 laptops. You can use the free WMI Filter Validation Tool to test you WMI filters in your environment. Personally I’m also using Scriptomatic version 2 and WBEMTEST for finding the available classes, items, queries etc.
Please have a look at the "rules" further down!
Why do this? Well, because it's fun - and useful at the same time... When looking at it generally, the purpose of this filter is to say: "I want these user settings to apply, but only when the user logs on to stationary machines". This can be used for a lot of security related setting, eg. in the case where Automatically cached Offline Files/Folders are unwanted on stationary machines for certain users etc. The job of most WMI filters placed on User policies is to limit which machines the policy setting(s) should apply to (even though WMI filters could check for user specific things too). Besides from that it's a nice challenge, we can pretty easily "spot" laptops, as they have batteries – and desktops don’t, but that’s not good enough for Mr. WQL, is it?!
Stuff we have tried - and the rules
We’ve been around solutions looking for Win32_SystemEnclosure > ChassisType before - which basically doesn’t work in a WMI filter because that’s an Array (and yes, I've also seen lots of posts on forums out there claiming that particular class is the solution – but for WMI/WQL queries it’s not). If would work in a script (because you can add additional logic to scripts), but we are searching for a WMI Filter - not workarounds of any kind!
As mentioned we tried with the Win32_Battery WMI class. However, as desktops don’t know this class at all, they'll return FALSE no matter what. Basically a desktop computer is gonna say “Heck, I don’t know anything about that class *Panic* I’m out!” – or just “False”... Bummer!
We have also tried PowerSupplyState, Win32_DesktopMonitor, Win32_DisplayConfiguration, Win32_SystemSlot, Win32_Fan and other classes – just haven’t found the perfect “this is definitely a desktop WMI item value or class”…
We're basically looking for something like:
A) Select * from Win32_SomeClassOnlyDesktopsHave
Or
B )Select * from Win32_SomeClass.SomeItem = “SomeValueOnlyDesktopsHave”
Or
C) Some way of saying “if you don’t know the class (eg. Win32_Battery), then apply the GPO anyway”
Again, the “quest” is to find the perfect, *universal*, way of spotting “Non-laptops” or Desktops – it can of course be done by looking for some special computer Manufacturer/Model, BIOS version, specific hardware driver or whatever – but that stuff it most likely gonna be different from environment to environment. Also, if we all just used computer names like “DESKxxx” for desktops and “LAPTxxx” for laptops, we could have used WMI filters for computer name – but unfortunately that’s not the case - or at least I won't consider that a valid solution :)
The thing is, that normally it’s the LAPTOPS that have special hardware – like Batteries and built-in Modems, PCMCIA slots etc. – so they are pretty easy to find. With desktop computers it’s another story – hope you can help us out here!
Please, again, we know lot’s of “workarounds”, but what we need is a *WMI filter* and it has to return *TRUE* for *DESKTOPS* (or let’s call the NON-LAPTOPS or NON-PORTABLES, it doesn’t really matter).
Remember, simplicity works - maybe the answer/solution is pretty straight forward? Feel free to post any additional questions to the mailing list!
Another example of what has been tried
We could maybe try to go for presence of PCI (and not Mini-PCI) or AGP slots, as we expect most desktops to have PCI slots (and laptops to have Mini-PCI, but that would depend on the form factor) – or maybe AGP (but does onboard VGA count as AGP? Any PCI VGA cards left out there? Yeah, probably...). If not we could maybe go for something like this:
A) Select * From Win32_SystemSlot Where SlotDesignation = “PCI%”
Or
B) Select * From Win32_SystemSlot Where SlotDesignation = “AGP”
However, this is not accepted as a solution as we cannot say that all desktop computers have AGP slots. But - maybe you can convince us otherwise?
Other cool Group Policy information:
You'll find additional Group Policy information at these sites:
www.gpanswers.com - The home of Group Policy guru and MVP Jeremy Moskowitz, check out the community there too!
TechNet Group Policy Forum - A brand new Group Policy forum on Microsoft TechNet
The Group Policy Team - The home of the Microsoft Group Policy Team
Jakob H. Heidelberg blog - My own blog, mostly about Group Policy and Security
www.heidelbergit.dk - My website with blog RSS, certifications, LinkedIn info etc.
Hope to hear from you soon - O' Yee Knight of the Microsoft Group Policy Table!
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