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33C3 talk on dissecting cellular modems
Yesterday, together with Holger 'zecke' Freyther, I co-presented at 33C3 about Dissectiong modern (3G/4G) cellular modems. This presentation covers some of our recent explorations into a specific type
Topics /
Networking & Internet
The most popular blog posts about networking & internet on Hacker News. 1,615 posts.
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Is it time to replace TCP in data centers?
One of my readers asked for my opinion about the provocative “It’s Time to Replace TCP in the Datacenter” article by prof. John Ousterhout. I started reading it, found too many things that didn’t make sense, and decided to ignore it as another attempt of a proverbial physicist solving hard problems in someone else’s…
1534
Are we self-sovereign PKI yet?
Every end-to-end encrypted messenger ships a fingerprint UI. Almost nobody opens it. A note on what's actually missing.
1535
Port 25 will be blocked for South Korea from December
Oh, boy has it been quiet here. I have used wayback machine to pull a bunch of older content into the repo so that it can be shared with you beautiful people. There was no real reason to do that except I get annoyed by broken links. Really annoyed. It seems every time I reach back into my bookmarks for something the…
1536
Lizard Stresser Runs on Hacked Home Routers
The online attack service launched late last year by the same criminals who knocked Sony and Microsoft ’s gaming networks offline over the holidays is powered mostly by thousands of hacked home Internet routers, KrebsOnSecurity.com has discovered.
1537
HAProxy: How to temporary disable a back end server using the command line
HAProxy can be controlled from the command line using its admin socket. This can be used to easily disable and enable a backend server on the cli.
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DIY PTP Grandmaster Clock with a Raspberry Pi
tl;dr: I set up an open source Time Pi project to build a stratum 1 PTP and NTP timeserver using a Raspberry Pi. Time is important to modern society, and most of us have a clock on our wrist that's more accurate than at any time in human history. But highly precise time is important in many industries, especially…
1540
Faking the TCP handshake
Update: This article has been superseded by a new post which hopefully explains it more clearly: Spoofing TCP connections without sequence number prediction
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A Future Without MPEG
Table of contents Introduction The situation today The competitors What is/will be available What the market offers Licensing of other media coding standards My views on the next steps of media coding standards A disclosure My forecast So, what will happen next? And now? Introduction My plan this week was to talk…
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SSL Labs: Stricter security requirements for 2014
Today, we're releasing a new version of SSL Rating Guide as well as a new version of SSL Test to go with it. Because the...
1546
One parser, two bugs, many routers: Exploiting Broadcom WiFi across eCos, Linux
A vulnerability in Broadcom’s proprietary WPS implementation enables unauthenticated attackers within WiFi range to leak memory and achieve unauthenticated remote code execution on millions of routers. This post covers its discovery through agentic vulnerability research, exploitation across eCos and Linux platforms…
1547
Two Birds with One Tone: I/Q Signals and Fourier Transform
An intuitive and ground-up introduction to I/Q signals. Learn the foundational concepts through clear geometric analogy perfect for beginners
1548
Pwned Certificates on the Fediverse
As well as the collection and distribution of compromised keys , the pwnedkeys project also matches those pwned keys against issued SSL certificates. I’m excited to announce that, as of the beginning of 2024, all matched certificates are now being published on the Fediverse , thanks to the botsin.space Mastodon server.
1549
I hope WebDAV dies
WebDAV is a file access and transfer protocol created in the 90s. It has support for file locks, arbitrary key-value properties attached to folders, file mimetypes, and many other features that extend this standard. It also has powerful access control features.
1550
The Sad State of Mobile XMPP in 2014
blog about networking, cameras, old gear, and xmpp
1551
Russian ship loitering near undersea cables
**Russian ship loitering near undersea cables** Updated: Original article 9th Oct. 2016. The Russian Navy’s Project 22010 mini-sub host ship Yantar is known for loitering near undersea internet cables (known as Submarine communications Cables - SCC). It may have other special missions also…. Read More >….
1552
Debugging my new network, when 10 Gigabit Ethernet Runs at 300 Megabits
I've been moving my home storage over to a UniFi UNAS Pro 8 as part of a larger ...
1553
The hidden cost of QUIC and TOU (2016)
Some new proposed protocols will encrypt the transport layer headers. Encryption is good, so more encryption must be better, right? Unfortunately there's going to be a huge hidden cost that'll be paid by anyone troubleshooting networking problems.
1554
Internet in a Box
I have finished my cruise now, which was mostly holiday, but also some work. I did some training for my mates (mainly in C coding) and we di...
1555
FareBot: Read data from public transit cards w/ your NFC-equipped Android phone
When it was announced that the Nexus S would have a built-in NFC radio, I immediately started thinking about the potential of using cell phones with RFID public transit fare systems. The day the Gingerbread source code was released, I picked up a Nexus S and began working on a proof-of-concept application that can…
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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…
1558
The speed of BGP network propagation
At the end of March 2019 I did a talk at the INEX’s (Ireland’s biggest internet exchange point) Annual General Meeting. I was supposed to record it, however in a brief panic due to HDMI not working on my laptop I forgot to start a recording of it. Since people found it interesting I figured I would turn it into a blog…
1559
Is XMPP any good? Also, let's write a client in Tcl, maybe
I still have my Nokia 5800 lying around. It runs Symbian. That platform is quite different from Android. For one thing the internal storage size is 81 MB - less than what your single android app takes up, even in RAM, and it works faster than modern smartphones - e.g. the SMS app opens instantaneously. Another…
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