Last week, Verizon caused a major BGP misroute that took large chunks of the Internet, including CDN company Cloudflare, partially down for a day. This week, the rest of the Internet has apparently asked Verizon to hold its beer.
Cloudflare went down again for half an hour yesterday, and this time, it was the company’s own fault—we’re still waiting on a full post-mortem, but the short version is that a firewall regular expression rule targeting malicious Javascript spiked the firewalls’ CPU usage, crippling throughput and causing widespread HTTP 502 errors. Microsoft’s Office365 also seems to have experienced a multi-hour partial outage yesterday, with the service working over some ISPs and routes but not others for about four hours.
