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When TCP sockets refuse to die

September 20, 2019 4:53PM

SYN TCP Spectrum Tech Talks

We noticed something weird - the TCP sockets which we thought should have been closed - were lingering around. We realized we don't really understand when TCP sockets are supposed to time out! We naively thought enabling TCP keepalives would be enough... but it isn't!...

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August 13, 2019 2:00PM

Magic Transit:Cloudflare規模で機能するネットワーク

本日当社は、インターネット上のIPトラフィックでのCloudflareのネットワークの利用を可能にする、Cloudflare Magic Transitを発表いたしました。従来、Cloudflareでは主にプロキシサービスを運営してきました。これは、当社のサーバーがインターネットユーザーのHTTP、TCP、UDPの各セッションを中断し、サーバーがオリジンサーバーとの間に作成する新規セッションを介してデータを渡す仕組みです。Magic Transitでは、CloudflareがIP層の運用にも関与します。...

November 29, 2018 9:54AM

Know your SCM_RIGHTS

As TLS 1.3 was ratified earlier this year, I was recollecting how we got started with it here at Cloudflare. We made the decision to be early adopters of TLS 1.3 a little over two years ago. It was a very important decision, and we took it very seriously....

TLS 1.3 TLS Security Linux TCP

January 15, 2018 1:49PM

SYN packet handling in the wild

Here at Cloudflare, we have a lot of experience of operating servers on the wild Internet. But we are always improving our mastery of this black art. On this very blog we have touched on multiple dark corners of the Internet protocols: like understanding FIN-WAIT-2 or receive buffer tuning....

SYN TCP Programming