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New
The latest blog posts to take off on Hacker News. 3,021 posts.
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Did AS8003 just disappear?
There has been a new development in The Mystery of AS8003. As you may recall, this was the AS number registered to a defunct company in Florida that appeared earlier this year in the global routing table announcing over 175 million IPv4 addresses belonging to the US Department of Defense. Well, that just changed.
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Linux implementation of Homa, a protocol to replace TCP for low-latency RPC
Programming note: I will be taking a several week break from writing paper reviews for the summer. When we come back, I will be finishing off the papers from Usenix ATC and OSDI , then moving on to the great upcoming conferences (my non-exhaustive list is here ). As always, feel free to reach out on Twitter with…
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Quad9 Files Official Objection Opposing Sony Music’s German Court Ruling
A public and free DNS service for a better security and privacy
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Dynamic visualization of your WiFi signal
Discover the latest in networking and IT innovation. Stay updated with product launches, expert insights, and tutorials from UniFi’s official blog.
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Conduit Beta – Matrix chat server
Conduit is a simple, fast and reliable chat server powered by Matrix. Conduit is an alternative to Synapse and tries to be lightweight and easy to install, but it is still in development.
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Forward and Reverse Proxies Explained
The fundamental difference between forward and reverse proxies
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Tor is a great sysadmin tool (2020)
Using Tor to aid various system administration tasks, including checking firewall rules, bypassing internal network restrictions and connecting to remote systems that are behind NAT/CGNAT.
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MarkMonitor left 60k domains for the taking
Thanks to Nagli and d0xing for helping figure out what was happening with this issue.
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Role-based access control like it was meant to be
Learn about role-based access control, its use cases and benefits.
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Another free CA as an alternative to Let's Encrypt
As the use of HTTPS continues to increase across the Web, we need more support from Certificate Authorities that issue the certificates to make it all work. I'm a huge fan of Let's Encrypt and what they're doing, but if we want to encrypt the entire Web,
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How Does FaceTime Work?
As an ex-pat living in Denmark, I use FaceTime audio a lot. Not only is it simple to use and reliable, but the sound quality is incredible. For those of you old enough to remember landlines, it reminds me of those but if you had a good headset. When
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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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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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Strange domain names that developers bought
Not every domain is serious business. Here's a few of the fun ones that we at Stack Overflow owned, as well as those owned by our community.
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Imaging Cygnus a at 8.45 GHz with ATA
Earlier this year, I published a post showing our results of the interferometric imaging of Cassiopeia A and Cygnus A at 4.9 GHz with the Allen Telescope Array . Near the end of July, I decided to perform more interferometric observations of Cygnus A at a higher frequency, in order to obtain better resolution. I chose…
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Increase HTTP performance by fitting in the initial TCP slow start window
Did you know that if your site’s under ~12kb the first page will load significantly faster? Servers only send a few packets (typically 10) in the initial round-trip while TCP is warming up (referred to as TCP slow start). After sending the first set of packets, it needs to wait for the client to acknowledge it…
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HTTP/2-exclusive threats caused by implementation flaws and RFC imperfections
In this research paper James Kettle introduces multiple new classes of HTTP/2-exclusive attacks, demonstrated on popular websites and servers.
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The Drunken Bishop Algorithm
There’s a tradition in my family that everyone takes a turn stirring a secret wish into the yearly christmas pudding . It’s important that the wishes remain secret to the wisher or the pudding magics wont work so since moving to America I’ve implemented a new way of hashing my wish so it can be stirred in via text…
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Bye CUPS: Printing with Netcat
Turns out printing doesn't have to be hard
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The 5-Hour CDN
You can build a functional CDN on an 8-year-old laptop while you're sitting at a coffee shop. Here's what a CDN you put together in five hours might look like.
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Microsoft Silently Dropping Emails – a Sad but True Story (2020)
From time to time Microsoft decides to block or even silently drop emails that are sent by my selfhosted email server. It’s always a pain and takes a lot of effort to deal with it. This time I decided to…Read more ›
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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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Introduction to open source private LTE and 5G networks
It’s so easy these days to set-up your own WiFi network. You order a router online, plug it into the electrical socket, define a password and you’re good to go. WiFi is fast, reliable and easy to use. But if you want to cover a wider area or connect hundreds of small devices it quickly […]