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@ -12,7 +12,10 @@ In order to block those, one can simply block the hostname `trackercompany.com`, |
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However, to circumvent this block, tracker companies made the websites using them load trackers from `somestring.website1.com`. |
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The latter is a DNS redirection to `website1.trackercompany.com`, directly to an IP address belonging to the tracking company. |
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Those are called first-party trackers. |
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On top of aforementionned privacy issues, they also cause some security issue, as websites are usually configured to trust first-party scripts. |
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For more information, learn about [Cross-Origin Resource Sharing](https://enable-cors.org/). |
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In order to block those trackers, ad blockers would need to block every subdomain pointing to anything under `trackercompany.com` or to their network. |
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Unfortunately, most don't support those blocking methods as they are not DNS-aware, e.g. they only see `somestring.website1.com`. |
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