Every blog post that took off on Hacker News, ranked by the votes of its best submission. 1,615 posts.
I needed a very basic 'Internet sharing' router setup with one of my Raspberry Pis, and I thought I'd document the setup process here in case I need to do it again. I should note that for more complex use cases, or where you really need to worry about security and performance, you should use something like OpenWRT…
You may think this is an easy task but let’s find out. One would expect such functionality in a web interface …
In the early days, when the Internet was just beginning, back in 1981, radio amateurs were allocated, by what is now known as IANA , an IPv4 block for usage and experimentation by all members of this hobby, internationally. This block was 44.0.0.0/8, which is a huge amount of address space by today’s standards, but…
On 26 Nov 2019 at 14:55 UTC, I logged into my server that hosts my website to perform a simple maintenance activity. Merely three minutes later, at 14:58 UTC, the domain name susam.in used to host this website was transferred to another registrant without any authorisation by me or without any notification sent to me…
A TCP reset attack is executed using a single packet of data, no more than a few bytes in size. A spoofed TCP segment, crafted and sent by an attacker, tricks two victims into abandoning a TCP connection, interrupting possibly vital communications between them.
Let's explore and deobfuscate the input stack on Linux. Our aim is to understand its components and what each does. Input handling can be divided into two parts, separated by a common layer. We’ll try to make sense of all this, one thing at a time, with a logical and coherent approach.
A blog about signals, programming, music, and other stuff.
Banks are scared. They’ve seen the rise of the new world of open APIs, apps and analytics and know that their organisations are not yet ready or fit to change to that world. What to do? Well, the easiest thing to do is to block access to the bank’s data. If third party FinTech firms...
Yesterday (Sept. 12) we scanned the entire Internet for port 22 -- the port reserved for "SSH", the protocol used by sysadmins to remotely l...
To @AndrewHart: “Our app is shit and we know it’s shit”. My life changed forever when a senior exec from one of the world’s largest retailers messaged me on Twitter. This was back in 2017. My outdoor AR navigation demos had just gone viral, and my new open-source project for...
The argument over the nano-SIM is a distraction. It's a sleight of hand designed to catch the industry off guard and fool it into doing something really stupid. The SIM is designed to do a number of things; encryption, address storage, hold SMS, etc. Most importantly, it's designed to be swappable. With GSM, you can…
How to use a company's TXT records to discover the products they use.
iOS 14 USB tethering broken on Linux: looking for documentation and contact at Apple
Benchmarks & Tips for Big Data, Hadoop, AWS, Google Cloud, PostgreSQL, Spark, Python & More...
netdev day 1: IPsec!
Feross Aboukhadijeh is a computer security researcher, teacher, web developer, designer, long distance runner, gamer, music lover, and builder of websites that (sometimes) go viral.
My LTE internet connection (70 Mbit downstream, 15 MBit upstream) came with a combined Huawei B315s LTE modem/access point. As I was using it for the last two to three years a couple of problems did arise: the internet connection was often shaky, oftentimes the uplink connection got lost and I had to power-cycle the…
Pádraig Brady taught me a great trick in a comment to a previous blog post and it was so neat I feel a need to highlight it further as it also makes it easier for me to find it again later! To simulate a far away server, add RTT time to the localhost device. For … Continue reading Add latency to localhost →
An introduction to my MCU based fully featured analog telephone exchange, how I mounted it in my home lab powered with batteries for months of use
In this post I'll provide some of my personal experience and history working with BGP, and introduce a new BGP library, CoreBGP, which can be used to build the next generation of BGP-enabled applications.
With AI encroaching every open forum on the internet, the future of human discourse is bleak.
A lot of community applications died when API access to twitter, reddit & others was severely restricted, but they can't stop us from sharing our own data with each other!
If you’re a programmer, a systems administrator, or really any type of IT worker, you probably have your favorite go-to IP addresses for troubleshooting.
Survival in an Extremely Adversarial Environment If your secure communications platform isn’t being used by terrorists and pedophiles, you&# …
A small HTTP-header tribute to Sir Terry Pratchett
Yes, it's true! I'm the author of ping for UNIX. Ping is a little thousand-line hack that I wrote in an evening which practically everyone seems to know about. :-)
