Impossible de bloquer des sites web via mon routeur Linksys

Bonjour

Je veux bloquer des sites web comme youtube par exemple via mon routeur linkys v4.30.7 mais ça ne marche pas, j'ai pourtant suivi toutes les démarches:

Citation:

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1. Login to your router by going to the IP address of it in your web browser. By default, it’s usually https://192.168.1.1
2.Click “Access Restrictions“.
3.In the drop down at the top of the screen, you can select which policy number you want to use. In this example, it’s 2 because I am already using 1 for a different policy.
4.Give the policy a name. I have named it “Block Urban Outfitters” in this example.
5.Click the “Edit List of PCs” button. It will bring up a window where you can specify which computers/connections to apply this rule to. You can do it by the network card MAC address or the IP address of the computer you wish to block. I prefer to use MAC address, because the IP address may change from day to day. The MAC address is usually listed on the network card. Click “Save Settings” when you’re done.
6.In the “Website Blocking by URL Address“, you can type the web address you would like to block. In my example, I have typed “https://www.urbanoutfitters.com“.
7.Be sure to click “Save Settings” when you are done.

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Merci