Every blog post that took off on Hacker News, ranked by the votes of its best submission. 1,615 posts.
How much do you know about how the PSTN (that is, the public telephone network) works? At some point long long ago, it was signalled using in-band frequencies, which facilitated the infamous phreaking using so-called “blue boxes”. This led to a switch to out of band signalling, ultimately culminating in something…
There's been a lot of talk about DNS-over-HTTPS aka DoH lately, primarily due to Mozilla's and Google's respective plans to move forward with enabling it in their browsers. There's also a lot of misunderstanding and conflation of speculated plans for world domination with practical benefits of the technology; it…
I’m not sure if they realize it yet, but Tailscale seems to work extremely well for polycules. Each user can have their own single-user Tailnet and explicitly share specific machines with other people. Both parties have to consent to sharing a device; either party can revoke this consent. The device owner can further…
If you’re like most people, there’s a good chance that it’s been years since you’ve sent an email that wasn’t cryptographically signed. You don’t use PGP, you say? Well, even if you are…
This post could’ve been titled “Nostr vs ATProto”, but that really isn’t what I wanted to do here. While I will be comparing and contrasting them a lot, and that’s kind of even the point of writing this, I didn’t want to really pit the two against each other at all, and especially not with the title. I also want to…
Chrome drops NPN for ALPN on May 31st, requiring OpenSSL 1.0.2+. CentOS, Debian, and most Ubuntu versions can't support it, breaking HTTP/2 for millions.
Honestly, I love the design of this thing. It reminds me of something from the good old sci-fi.
This is week "1111111111" in the GPS system. Tomorrow morning it will roll over to week "0000000000". How well will various systems handle this change? Not well, judging by what we've seen so far!
Everyone knows that on most systems you can specify IPv4 addresses just 4 decimal numbers separated with periods (dots). Example: 192.168.0.1 Useful when you for example want to ping your local wifi router and similar. "ping 192.168.0.1" Other bases The IPv4 string is usually parsed by the inet_addr() function or at…
Wouldn't it be great if you could call a Google Voice number directly via SIP? So that you could bypass the PSTN when calling a GV number and go directly over IP? With potentially all the advanced capabilities that could give? (wideband audio, video, etc.) It turns out that you now can !
I was lucky enough to attend to EuroBSDCon 2023 and offered the opportunity to talk about one of my favorite OpenBSD stock daemon: relayd(8). The talk was recorded and made available on the EuroBSDCon YouTube channel. . One may check the EuroBSDCon 2023 program for more material. This post attempts a reboot of the…
(Note: This is the third and final part of a series. Part one appeared Monday and part two appeared yesterday.)
Arduino Websocket Client Arduino Pusher Client Pusher – Real Time Push Notifications Follow Me On Twitter: @kevinrohling If you don’t have your very own Arduino yet you should get one. …
First part of a story on how I’ve built 25 Gbps router for home use.
Software engineer, Free, Open Source Software Consultant, Innovator, Fedora & Debian Developer
The GDID helped catch a hacker despite his VPN. I set up a VM to see if it can be neutralized: what works, what doesn't, and the scripts to stop it from ...
Twitter has posted some of their upcoming API-policy lockdowns and restrictions in this post from Michael Sippey , euphemistically titled “Changes coming in Version 1.1 of the Twitter API”.
Protocols are a geeky topic. It’s way more interesting to talk about applications. People will go on and on about why they like gmail or some other email application. But not a lot of people get excited about SMTP and IMAP which are the underlying email protocols that allow the gmail application to talk to […]
While starting my first year at the Colorado School of Mines, I came across a rather interesting fact: the local DNS servers will assign a subdomain to each device that connects to the network. This means that a device called “meow” will be visible as “meow.mines.edu” on any campus wifi, though the network still…
Linux uses an LPC-trie for looking up routes. It provides good performance with low memory use even with millions of routes.
This post is about an obscure corner of TCP network programming, a corner where almost everybody doesn’t quite get what is going on. I used to think I understood it, but found out last week that I didn’t.
Personal Blog of Christian Haschek
Token Ring and ARCNET once competed with Ethernet as networking standards
The Internet Architecture Board (IAB) has published RFC8890, The Internet is for End Users, arguing that the Internet Engineering Task Force (IETF) should ground its decisions in what’s good for people who use the Internet, and that it should take positive steps to achieve that.
