È probabile che il Facebook-Instagram-WhatsApp down sia un problema di DNS
Sarebbe da escludere qualsiasi collegamento con un attacco: sembra più probabile una saturazione.
https://www.giornalettismo.com/dns-facebook-instagram-whatsapp-down-problema/
https://uploadvr.com/facebook-dns-oculus-down/
Il problema sta causando un effetto a catena sui DNS dei vari provider
To be more precise (and Geek Factor 5) the BGP routes serving Facebook's authoritative DNS were withdrawn, rendering all Facebook domains inaccessible. That's per @DougMadory, who knows a few things about BGP/DNS.
The major outage of Facebook, Instagram and WhatsApp apparently causes problems at DNS providers too as the corresponding apps are hammering their resolvers hard
Facebook is down and the whole internet is having troubles
Some users of #AdGuardDNS might experience temporary issues. This is likely caused by the current issues with Facebook availability.
Facebook name servers are timing out and at the same time, we're experiencing a HUGE spike in DNS queries to those name servers. This quickly exhausted the servers resources. We're implementing a fix that would solve this issue.
The current status of AdGuard DNS can be monitored at https://status.adguard.com