topic Hi Enid, in Network Security

Cannot block YouTube as an application

Enid Vallja — Tue, 12 Mar 2019 13:23:48 GMT

Hi guys!

I need some help with the Access Control policies.

I'm trying to block YouTube for some object groups but when I block https://www.youtube.com I see other links of YouTube that are allowed, like:

https://img.youtube.com

https://s.youtube.com

https://consent.youtube.com

https://fcmatch.youtube.com

https://youtubei.youtube.com etc.

I'm blocking all the url-s one by one but new ones come out again and again.

I tried to block "*youtube.com" which I thought will cover all these pages but it still don't work. Tried "^youtube.com" but still not.

Any idea what to do?

Hello,

Veronika Klauzova — Tue, 16 May 2017 21:11:16 GMT

Hello,

Web pages like youtube and/or facebook will request multiple pages upon loading. In order to allow their "web-site dependencies" - images, videos etc. is to allow CDN URL web category, but this requires URL filtering license applied on the device.

Best regards,

Veronika

Thank you Veronika!

Enid Vallja — Wed, 17 May 2017 06:35:16 GMT

Thank you Veronika!

In fact yesterday I found a partial solution, so I blocked https://*.youtube.com and than the urls:

https://img.youtube.com

https://s.youtube.com

https://consent.youtube.com

https://fcmatch.youtube.com

https://youtubei.youtube.com

were blocked. But I see some Conection Events of YouTube which don't show an url but just the applications (YouTube & YouTube Upload). I tried to block YouTube app and YouTube Upload app but still nothing.

Regards,

Enid

Hi Enid,

Veronika Klauzova — Mon, 22 May 2017 14:29:43 GMT

Hi Enid,

this requirement should be possible to be achieved by creating simple ACP rule with one URL object with "youtube.com" entry as it will match *youtube.com*. This way you can simply deny the whole youtube access without need of URL license and without need for SSL decryption.

I cannot see your full access control policy rule from the provided screenshots, but is seems that you have Application and URL columns filled in at the same time. Please note that between those columns in rule is AND operation which means that one of the listed applications and one of the URL's listed in rule needs to match at the same time otherwise the rule will not match.

If above still does not determine an issue on your end, could you provide debug output from sensor CLI:

>system support firewall-engine-debug

(filter for specific connection to avoid having much noise here)

and

provide screenshot from FMC GUI Help -> About section.

Best regards,

Veronika

Hi Veronica,

enidvallja — Wed, 12 Jul 2017 10:16:27 GMT

Hi Veronika,

it's been 2 months now and I'm still confused with some new changes I'm making.

Sometimes it works when you block the url with * like *google.com, and sometimes with https://*.google.com. I've even seen some cases written like ^google.com.

What shall I to use to generalize the url for the entire Google pages like translate, maps, drive etc.

Regards,

Enid.