SonicWall content filtering youtube

I am blocking multimedia on a SonicWall using Content Filtering Service. I have created an exception for youtube.com. Users can now get to youtube.com  now but they can't play videos. I verified the videos have a youtube.com url.

If I don't block multimedia, youtube works.

Any idea why users can get to youtube but not play videos?
ajdratchAsked:
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Blue Street TechConnect With a Mentor Last KnightCommented:
You need to re-read my last post (https:#a39673088). I'm telling you that you cannot simply whitelist youtube.com because youtube.com uses other external domains to provide content, which I have listed below.

In addition to adding youtube.com, add these domains to the Allowed Domains list and you will be able to watch videos on youtube.com:
1. google.com
2. googleusercontent.com
3. googlevideo.com
4. gstatic.com
5. ytimg.com
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alexzivCommented:
try to unblock multimedia than
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ajdratchAuthor Commented:
I know that will allow usres to play youtube videos. The point is I want to block all multimedia except youtube
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alexzivCommented:
youtube is multimedia, unless you do an extra work on your router to ban for exactly user you want.
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Blue Street TechLast KnightCommented:
Hi ajdratch,

Are you using App Control as well?

Content Filtering Service (CFS) works on the domain level (URL based), however, many sites have external content being delivered dynamically by external domains. For example, bing.com has outlook.com, live.com and msn.com all delivering content...therefore if you do not whitelist those domains part or all of the bing.com site will not function properly.

The same is true with youtube.com. Vet external domains and add them to the whitelist.

You need to also add to the whitelist the following domains:
1. google.com
2. googleusercontent.com
3. googlevideo.com
4. gstatic.com
5. ytimg.com
Let me know if you have questions!
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ajdratchAuthor Commented:
Not using app control. As I mentioned in the original post -  verified the videos have a youtube.com url.
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ajdratchAuthor Commented:
That did it, thanks
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Blue Street TechLast KnightCommented:
No problem...my pleasure. I'm glad I could help and thanks for the points!
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kmiller_otsCommented:
That worked for me as well.  Thank you.  How did you find the list of sites that needed to be added?
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Blue Street TechLast KnightCommented:
@kmiller_ots - Sorry I didn't see your post til now. Since web 2.0 and the surge of Content Delivery Networks/Content Distribution Networks (CDN) websites are imbedding multiple URIs now. Therefore, the act of simply whitelisting is becoming more and more complicated; especially if the websites are using Ad Servers to deliver objects like CSS or imagery/video, etc. so they can track with further analytics. It's painful but you can use dev tools in any modern browser to source all the URI's that a website uses. Additionally, there are some online tools as well you can search for. Hope that helps.
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