2025-05-07
udpgrm is a lightweight daemon for graceful restarts of UDP servers. It leverages SO_REUSEPORT and eBPF to route new and existing flows to the correct server instance....
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2023-06-26
In this post, we'll provide some insight into the process of investigating networking issues and how to begin debugging issues in the kernel using pwru and kprobe tracepoints...
2023-06-20
Today, Cloudflare is super excited to announce that we’re bringing traffic acceleration to customer’s UDP traffic. Now, you can improve the latency of UDP-based applications like video games, voice calls, and video meetings by up to 17%...
2022-02-02
Often programmers have assumptions that turn out, to their surprise, to be invalid. From my experience this happens a lot. Every API, technology or system can be abused beyond its limits and break in a miserable way...
2021-12-08
Last year, we launched a new feature which empowered users to begin building a private network on Cloudflare. Today, we’re excited to announce even more features which make your Zero Trust migration easier than ever. ...
November 25, 2021 5:27 PM
Historically Cloudflare's core competency was operating an HTTP reverse proxy. We've spent significant effort optimizing traditional HTTP/1.1 and HTTP/2 servers running on top of TCP....
November 13, 2021 2:33 PM
Earlier this week, Cloudflare automatically detected and mitigated a DDoS attack that peaked just below 2 Tbps — the largest we’ve seen to date....
October 07, 2021 2:20 AM
Because of the sustained attacks we are observing, we are sharing details on recent attack patterns, what steps they should take before an attack, and what to do after an attack has taken place....
September 18, 2020 11:00 AM
SYN-cookies help mitigating SYN-floods for TCP, but how can we protect services from similar attacks that use UDP? We designed an algorithm and a library to fill this gap, and it’s open source!...
January 08, 2020 5:08 PM
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....
October 12, 2019 1:00 PM
We recently gave a presentation on Programming socket lookup with BPF at the Linux Plumbers Conference 2019 in Lisbon, Portugal. This blog post is a recap of the problem statement and proposed solution we presented....
