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September 07, 2017 8:58PM

The Story of Two Outages

Over the last two days, Cloudflare observed two events that had effects on global Internet traffic levels. Cloudflare handles approximately 10% of all Internet requests, so we have significant visibility into traffic from countries and networks across the world....

Network BGP Outage Hurricane

February 04, 2015 2:16PM

Path MTU discovery in practice

Last week, a very small number of our users who are using IP tunnels (primarily tunneling IPv6 over IPv4) were unable to access our services because a networking change broke "path MTU discovery" on our servers....

BGP IPv6 IPv4

November 29, 2012 8:13PM

How Syria Turned Off the Internet

Today, 29 November 2012, between 1026 and 1028 (UTC), all traffic from Syria to the rest of the Internet stopped. At CloudFlare, we witnessed the drop off. We've spent the morning studying the situation to understand what happened....

Network BGP Outage Syria