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How to prevent email spoofing, using an unholy combination of silly standards
How to use SPF, DKIM, and DMARC to improve your domain's email security and limit spoofing - but written for humans.
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My NAS exposes itself over the internet without permission
The Terramaster NAS decided to expose itself to the public internet without asking. Let's see what we can do about it.
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The internet is held together with spit and baling wire
A visualization of the Internet made using network routing data. Image: Barrett Lyon, opte.org.
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Netcat – All you need to know
Introduction Netcat is a tool that reads and writes data across network connections, using TCP or UDP protocol. Netcat has been referred to as the TCP/IP / networking swiss army knife. In this article we’ll look at different applications of netcat and how it can be useful in day to day activities of a pentester…
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I made 50k calls to explore the telephone network
Post describing my research wardialing Finnish freephones.
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A realization of why email is critical infrastructure for the Internet
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
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Demonopolizing the Internet with Interoperability
The Communications of the Association for Computing Machinery has just published my editorial, "Competitive Compatibility: Let's Fix the Internet, Not the Tech Giants," explaining how interoperability was once an engine for competition and user empowerment – and how that ended.
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Decoding James Webb Space Telescope
The James Webb Space Telescope probably needs no introduction, since it is perhaps the most important and well-known mission of the last years. It was launched on Christmas day from Kourou, French Guiana , into a direct transfer orbit to the Sun-Earth L2 Lagrange point . JWST uses S-band at 2270.5 MHz to transmit…
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gemini:// space
Anubis could not load its JavaScript. The server may be overloaded. Please reload the page to try again.
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Closing web browser windows doesn't close connections
Months ago I noticed something strange in the Little Snitch Network Monitor: Safari was still connecting to web sites after every window had been closed. At the time, I thought this was just a Safari bug. I brought the issue to the attention of some Safari engineers, who I had hoped would look into it. Since then…
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Freenode commits suicide, is no longer a serious IRC network
Since this happened after I was banned from Freenode , I didn't get to observe this first hand, but this is the situation as I now understand it.
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Container networking is simple (2020)
Begin with the basics to understand Docker and Kubernetes networking: learn how to create and interconnect Linux network namespaces using only command-line tools.
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Tracking One Year of Malicious Tor Exit Relay Activities (Part II)
>25% of the Tor network’s exit capacity has been attacking Tor users
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Bitsquatting Windows.com
Earlier this month, I came back around to seriously considering an attempt at bitsquatting. While the prior link goes into great depth on the topic, I will attempt to give a very high level overview here: If this sort of thing interests you: I tend to do stuff like this weekly. Give me a follow @_mattata
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The Confusing World of USB
For decades, my perception of USB was that of a technology both simple and reliable. You plug it and it works. The two first iterations [1] [2] freed PCs from a badly fragmented connector world made of RJ-45 (Ethernet), DA-15 (Joystick), DE-9 (Serial), DIN (PS/2), SCSI, and DB-25 (Parallel). When USB-3.0 came out…
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Intruder at the top of the 20 meter amateur band?
It wasn't my intent to have this next post be about locating a source of a transmitter - but the temptation proved irresistible. Over the pa...
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Simple Raspberry Pi Powered SMS Gateway
Personal Blog of Christian Haschek
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Freenode IRC operators now engaging in routine abuses of power
There have been several allegations of this since the handover of the Freenode infrastructure to its new custodians, but I can now provide a first-hand account of one incident — because I am the victim of it.
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My multi-decade quest for rural broadband
No corporate parables or historical insights this week, just the odd and sometimes amusing tale of the author's multi-decade quest for internet connectivity.
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Wikivoyage has disappeared from DuckDuckGo
Update (2021-10-31): DuckDuckGo now includes results for Wikivoyage again, as do Bing and Yahoo. I have been planning a long due vacation and I was doing some research into the places I wanted to visit. My goto travel guide is Wikivoyage: it’s well organised, text-heavy (instead of slideshow-heavy alternatives) and…
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Hello IPv6: a minimal tutorial for IPv4 users
A short IPv6 tutorial, explaining the basics, primarily for home and small networks.
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What domain name to use for your home network
Always use the ‘.home.arpa’ top-level domain (RFC 8375), and don’t use the special-purpose ‘.local,’ or made-up undelegated domain names like ‘.lan’ or ‘.home.’
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The Actual OSI Model
I have said before that I believe that teaching modern students the OSI model as an approach to networking is a fundamental mistake that makes the concepts less clear rather than more. The major reason for this is simple: the OSI model was prescriptive of a specific network stack designed alongside it, and that…
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Avoid Consumer Routers
Consumer Routers are not secure