VPN blocking, outages, DNS/CDN, and network events

How we analyze an event

• What happened: country, network, service, date, and duration.
• What users see: DNS failure, TCP reset, TLS error, speed drop, or one-site failure.
• How to verify: OONI/NetBlocks, traceroute, DNS answers, another network, and direct-vs-VPN comparison.
• What users can do: change server, check DNS/WebRTC/IPv6, update the app, or wait for network recovery.

Monitoring sources