The maths is brutal. On a match day, blocking just 4 to 20 IP addresses knocked out more than 400,000 unrelated domains. The outage lasted as long as the game.
None of this is new in kind, only in scale. Courts across Europe have long ordered providers to block pirate sites. Spain runs one of the continent’s most aggressive regimes. What has changed is the plumbing. The web now runs on shared infrastructure, so a crude IP block is a shotgun, not a scalpel.
How do these blocks work on a technical level? Are these DNS blocks? Are there any DNS providers who do not take part in this?
It’s by IP:
They basically block off Cloudflare while there is a game going on.
Basically internet providers are blocking a range of IPs, so DNS does not matter.