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The C10K problem
It's time for web servers to handle ten thousand clients simultaneously, don't you think? After all, the web is a big place now.
Most cited
Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 32 posts.
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State Laws That Stop Cities From Installing Fast Internet
For decades, municipal broadband operations have been subject to a minefield of restrictions and barriers designed to make the prospect of establishing or maintaining a community broadband network costly, difficult, and unsustainable. The Biden administration initially pledged that the Broadband Equity, Access, and…
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DNSSEC Downtime: List of Outages & Validation Failures
Major DNSSEC Outages and Validation Failures
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The Relative Cost of Bandwidth Around the World
Over the last few months, there’s been increased attention on networks and how they interconnect. CloudFlare runs a large network that interconnects with many others around the world.
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CNAME Flattening: RFC-Compliant CNAMEs at a Domain's Root
This post is about a new feature we've been quietly rolling out over the last few months. Last week we began enabling it for everyone by default.
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Network Link Conditioner
App developers often forget to test how their apps perform under less-than-ideal networking environments. Learn how you can use the Network Link conditioner to simulate a spotty Internet connection on your device.
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Why HTTP/2.0 does not seem interesting (2012)
Varnish is a powerful, flexible HTTP accelerator that speeds up web applications by caching content and optimizing delivery.
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Mystery signal from a helicopter
I heard a mysterious sound in a Youtube video and started to investigate.
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Tor security advisory: “relay early” traffic confirmation attack
This advisory was posted on the tor-announce mailing list. SUMMARY: On July 4 2014 we found a...
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HFT in My Backyard
INTRO As soon as the summer sun returns to Belgium, there is a natural human migration from Francophone Wallonia to the west coast sea in the Flemish part of the country. Here, à la mer du Nord, pe…
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Keyless SSL: The Nitty Gritty Technical Details
We announced Keyless SSL yesterday to an overwhelmingly positive response. We read through the comments on this blog, Reddit, Hacker News, and people seem interested in knowing more and getting deeper into the technical details.
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The New Normal: 200-400 Gbps DDoS Attacks
Over the past four years, KrebsOnSecurity has been targeted by countless denial-of-service attacks intended to knock it offline. Earlier this week, KrebsOnSecurity was hit by easily the most massive and intense such attack yet — a nearly 200 Gbps assault leveraging a simple attack method that industry experts say is…
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Technical Details Behind a 400Gbps NTP Amplification DDoS Attack
On Monday we mitigated a large DDoS that targeted one of our customers. The attack peaked just shy of 400Gbps. We've seen a handful of other attacks at this scale, but this is the largest attack we've seen that uses NTP amplification.
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The Sad State of Mobile XMPP in 2014
blog about networking, cameras, old gear, and xmpp
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The C10M problem
It's time for servers to handle 10 million simultaneous connections, don't you think? After all, computers now have 1000 times the memory as...
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No-IP's Formal Statement on Microsoft Takedown
Microsoft served a federal court order and seized 22 of our most commonly used domains because they claimed that some of the subdomains have been abused.
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IPv6 privacy addresses crashed the MIT CSAIL network
A few hours ago, I sent the following “dear colleagues” email (lightly edited to remove some private details) to all my users at work: This has been a very trying week. For those of you…
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Android betrays tethering data
Software engineer, Free, Open Source Software Consultant, Innovator, Fedora & Debian Developer
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Bash 'shellshock' scan of the Internet
NOTE: malware is now using this as their User-agent. I haven't run a scan now for over two days. I'm running a scan right now of the I...
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Possible upcoming attempts to disable the Tor network
The Tor Project has learned that there may be an attempt to incapacitate our network in the next...
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Game servers: UDP vs TCP
When writing networked games, the question of UDP vs TCP will eventually come up. Typically you will hear people say things like: “Unless you’re doing action games, you can use TCP̶…
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HFT in my backyard – II
This is insane: more than 28,000 visitors came to read Part I of “HFT in my backyard”. Some of them are inevitably bots, but my logs reveal the majority to be human readers from bank desks, technol…