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April 06, 2020 12:00PM
We were wondering - can we just enable Linux "conntrack"? How does it actually work? I volunteered to help the team understand the dark corners of the Linux's "conntrack" stateful firewall subsystem....
January 14, 2020 4:07PM
At Cloudflare, we develop protocols at multiple layers of the network stack. In the past, we focused on HTTP/1.1, HTTP/2, and TLS 1.3. Now, we are working on QUIC and HTTP/3, which are still in IETF draft, but gaining a lot of interest....
January 08, 2020 5:08PM
Significant work has gone into optimizing TCP, UDP hasn't received as much attention, putting QUIC at a disadvantage. Let's explore a few tricks that help mitigate this....
September 20, 2019 4:53PM
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!...
September 20, 2019 4:53PM
닫혀 있어야 할 TCP 소켓이 계속 남아 있다는 이상한 점을 깨닫게 되었습니다. TCP 소켓이 언제 타임 아웃되는지 제대로 이해하고 있지 않았던 것입니다! TCP 킵얼라이브만 켜 두면 될 거라 생각했습니다만... 그렇지 않았습니다!...
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