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eBPF 101: Your First Step into Kernel Programming

news.ycombinator.com Shrijith Venkatramana 2025-10-17 18:17:07

eBPF has revolutionized Linux observability and security by allowing sandboxed programs to run in the kernel without changing kernel source code or loading modules I. What is this eBPF? It looks scary! Have you wanted to write programs that act as drivers for Linux? Wanted programs to run at a kernel level? Wanted to monitor events, internal resources and get better observability? All you need to know is how to make good use of Linux eBPF. eBPF is a technology in the Linux kernel that can run

Topics: bpf ebpf interface packet program

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T-Mobile is bringing low-latency tech to 5G for the first time

theverge.com Jay Peters 2026-01-03 08:00:00

is a news editor covering technology, gaming, and more. He joined The Verge in 2019 after nearly two years at Techmeme. Over the next few weeks, T-Mobile is expanding support for the L4S standard, which stands for “Low Latency, Low Loss, Scalable Throughput.” The technology helps high-priority internet packets move along with fewer delays, to make video calls and cloud games feel smoother and reduce annoying hitches. Users won’t need a special phone or plan to take advantage of the benefits fr

Topics: congestion l4s mobile packets saw

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A 14kb page can load much faster than a 15kb page (2022)

news.ycombinator.com Unknown 2026-01-03 04:26:45

Why your website should be under 14kB in size Why your website should be under 14kB in size Having a smaller website makes it load faster — that's not surprising. What is surprising is that a 14kB page can load much faster than a 15kB page — maybe 612ms faster — while the difference between a 15kB and a 16kB page is trivial. This is because of the TCP slow start algorithm. This article will cover what that is, how it works, and why you should care. But first we'll quickly go over some of the

Topics: 14kb packets satellite server tcp

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Why your website should be under 14kB in size

news.ycombinator.com Unknown 2026-01-03 10:26:45

Why your website should be under 14kB in size Why your website should be under 14kB in size Having a smaller website makes it load faster — that's not surprising. What is surprising is that a 14kB page can load much faster than a 15kB page — maybe 612ms faster — while the difference between a 15kB and a 16kB page is trivial. This is because of the TCP slow start algorithm. This article will cover what that is, how it works, and why you should care. But first we'll quickly go over some of the

Topics: 14kb packets satellite server tcp

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TCP-in-UDP Solution (eBPF)

news.ycombinator.com Matthieu Baerts 2026-01-02 21:59:08

The MPTCP protocol is complex, mainly to be able to survive on the Internet where middleboxes such as NATs, firewalls, IDS or proxies can modify parts of the TCP packets. Worst case scenario, an MPTCP connection should fallback to “plain” TCP. Today, such fallbacks are rarer than before – probably because MPTCP has been used since 2013 on millions of Apple smartphones worldwide – but they can still exist, e.g. on some mobile networks using Performance Enhancing Proxies (PEPs) where MPTCP connect

Topics: checksum data packet tcp udp

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I found a better way to transfer files between Android and Linux - and it's free

zdnet.com Jack Wallen 2026-01-11 15:17:00

nailzchap/Getty Images I often need to send a file from my Pop!_OS Linux desktop to my Android device. Over the years, I've found a variety of solutions, but this latest option -- called Packet -- makes transferring files between Linux and Android a breeze. Packet works with Quick Share. The only requirement is that both desktop and mobile devices be on the same wireless network. Also: Two new Android 16 security features protect you better - how to switch them on now Let me show you how to

Topics: android file files linux packet

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Implementing fast TCP fingerprinting with eBPF

news.ycombinator.com Unknown 2026-02-13 06:59:26

In this article I want to document my journey implementing fast TCP fingerprinting in a golang webserver, using eBPF. Just to provide some background, TCP fingerprinting is one of the many techniques that can be used to detect unusual or identifying informations about a web request when implementing an anti-bot solution. This has been a hot topic lately, caused by the rising need to scrape the internet for human content to feeed to the LLMs. Implementing such a system offers interesting techn

Topics: client connection ebpf packet tcp

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Record DDoS pummels site with once-unimaginable 7.3Tbps of junk traffic

news.ycombinator.com Unknown 2026-02-26 18:56:57

Large-scale attacks designed to bring down Internet services by sending them more traffic than they can process keep getting bigger, with the largest one yet, measured at 7.3 terabits per second, being reported Friday by Internet security and performance provider Cloudflare. The 7.3Tbps attack amounted to 37.4 terabytes of junk traffic that hit the target in just 45 seconds. That's an almost incomprehensible amount of data, equivalent to more than 9,300 full-length HD movies or 7,500 hours of H

Topics: data packets ports target udp

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Record DDoS pummels site with once-unimaginable 7.3Tbps of junk traffic

arstechnica.com Unknown 2026-02-27 22:04:22

Large-scale attacks designed to bring down Internet services by sending them more traffic than they can process keep getting bigger, with the largest one yet, measured at 7.3 terabits per second, being reported Friday by Internet security and performance provider Cloudflare. The 7.3Tbps attack amounted to 37.4 terabytes of junk traffic that hit the target in just 45 seconds. That's an almost incomprehensible amount of data, equivalent to more than 9,300 full-length HD movies or 7,500 hours of H

Topics: data packets ports target udp

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I found a file-transferring app that works between Android and Linux - and it's free to use

zdnet.com Jack Wallen 2026-02-28 08:15:00

Must. Connect. To. Linux. Jack Wallen/ZDNET Almost daily, I need to send a file from my Pop!_OS Linux desktop to my Android device. Over the years, I've found some solutions, but this latest option, called Packet, makes sending files from Linux to Android a breeze. Packet works with Quick Share, and both desktop and mobile devices only have to be on the same wireless network to function. Once on the same network, sending a file to Android is simple. Also: My 6 favorite open-source Android app

Topics: android file files linux packet

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Testing a Robust Netcode with Godot

news.ycombinator.com Unknown 2026-02-27 21:57:09

Testing a Robust Netcode with Godot The biggest challenge I faced in developing Little Brats! was the online multiplayer part: synchronizing computers with sometimes consequent latency while maintaining the “fast-paced action game” aspect was far from simple. I'll tell you all about it! Lag compensation, prediction/reconciliation, etc. I'm not going to do a detailed tutorial on these points, as there are tons of them already, but to give you an idea of the principle: when a client computer pe

Topics: game lost network packets server

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This Linux app makes sharing files to Android a breeze - here's how

zdnet.com Jack Wallen 2026-03-03 17:36:23

Must. Connect. To. Linux. Jack Wallen/ZDNET Almost daily, I need to send a file from my Pop!_OS Linux desktop to my Android device. Over the years, I've found some solutions, but this latest option, called Packet, makes sending files from Linux to Android a breeze. Packet works with Quick Share, and both desktop and mobile devices only have to be on the same wireless network to function. Once on the same network, sending a file to Android is simple. Also: My 6 favorite open-source Android app

Topics: android file files linux packet

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Locally hosting an internet-connected server

news.ycombinator.com Unknown 2026-03-07 06:58:53

[Interface] PrivateKey = privkeyhere ListenPort = 51820 Address = localaddr/32 [Peer] Endpoint = VPS:51820 PublicKey = pubkeyhere AllowedIPs = VPS/0 [Interface] Address = vpswgaddr/32 SaveConfig = true ListenPort = 51820 PrivateKey = privkeyhere [Peer] PublicKey = pubkeyhere AllowedIPs = localaddr/32 321.985.520.309 867.420.696.005 iptables -t nat -A PREROUTING -p tcp -d 321.985.520.309 -j DNAT --to-destination 867.420.696.005 321.985.520.309 867.420.696.005 net.

Topics: address ip packets vps wireguard

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Latest Tech News

eBPF 101: Your First Step into Kernel Programming

T-Mobile is bringing low-latency tech to 5G for the first time

A 14kb page can load much faster than a 15kb page (2022)

Why your website should be under 14kB in size

TCP-in-UDP Solution (eBPF)

I found a better way to transfer files between Android and Linux - and it's free

Implementing fast TCP fingerprinting with eBPF

Record DDoS pummels site with once-unimaginable 7.3Tbps of junk traffic

Record DDoS pummels site with once-unimaginable 7.3Tbps of junk traffic

I found a file-transferring app that works between Android and Linux - and it's free to use

Testing a Robust Netcode with Godot

This Linux app makes sharing files to Android a breeze - here's how

Locally hosting an internet-connected server

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