Notes

Short pieces on how sites get blocked and how to see it. Every number links to its source.

• Why datacenter uptime monitors miss ISP blocks
  Blocks live in operator resolvers and access networks; cloud monitors never pass through them.
• Collateral blocking in Europe
  554,507 domains hit by Spanish football blocks in five months, Google Drive in Italy, Cloudflare in Austria.
• Red warnings and lost visitors
  Users go past only a tenth to a quarter of malware and phishing warnings. What gets sites flagged.