Posts by John Graham-Cumming

No Scrubs: The Architecture That Made Unmetered Mitigation Possible

Published on by John Graham-Cumming.

When building a DDoS mitigation service it’s incredibly tempting to think that the solution is scrubbing centers or scrubbing servers. I, too, thought that was a good idea in the beginning, but experience has shown that there are serious pitfalls to this approach. A scrubbing server is a dedicated

2017 and the Internet: our predictions

Published on by John Graham-Cumming.

An abbreviated version of this post originally appeared on TechCrunch Looking back over 2016, we saw the good and bad that comes with widespread use and abuse of the Internet. In both Gabon and Gambia, Internet connectivity was disrupted during elections. The contested election in Gambia started with an Internet

How the Dyn outage affected Cloudflare

Published on by John Graham-Cumming.

Last Friday the popular DNS service Dyn suffered three waves of DDoS attacks that affected users first on the East Coast of the US, and later users worldwide. Popular websites, some of which are also Cloudflare customers, were inaccessible. Although Cloudflare was not attacked, joint Dyn/Cloudflare customers were affected.