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Laurent Cheylus

@lcheylus@bsd.network
mastodon 3.5.19+iceage
  • Open on bsd.network

Software engineer specialized in Cybersecurity

Linux OpenBSD FreeBSD - FOSS Contributor
Lyon (France) addict
Messages in French 🇫🇷 and English 🇬🇧

0 Followers
0 Following
30 Posts
Joined April 27, 2022
Twitter:
https://twitter.com/lcheylus
GitHub:
https://github.com/lcheylus
Open post
Laurent Cheylus @lcheylus@bsd.network
· 1w ago
Deshittification of your Smart TV at Home using OpenBSD pf and Unbound: block Ad Networks and Telemetry while keeping apps like Netflix and Smart TVs working flawlessly - Detailed Article by Lari Huttunen #OpenBSD #Privacy https://fabricati-diem.inform.social/post/deshittification-as-a-service/
Fabricati Diem

Deshittification as a Service: Reclaiming Privacy and Performance with OpenBSD pf and Unbound

How to use OpenBSD's Packet Filter and Unbound to build a zero-trust network sandbox that neutralizes Smart TV telemetry—and inadvertently speeds up streaming across your entire home network.

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago
Replying to
@genma@framapiaf.org Ça dépend des perfs que tu souhaites avoir pour le throughput de ton accès WAN (j'imagine une fibre à 1 Gbps). Les mini-PC fanless de la marque Qotom sont pas mal. Sinon tu as aussi pléthore de choix chez AliExpress en mini-PC avec proc Intel N105 + X interfaces Gigabit + Wifi.
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 7mo ago

Motorola announces a partnership with GrapheneOS Foundation ; they will work to strengthen Smartphone Security and collaborate on future Devices engineered with #GrapheneOS compatibility https://motorolanews.com/motorola-three-new-b2b-solutions-at-mwc-2026/

bsd.network
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 7mo ago

Researchers at IMDEA Networks Institute, together with European partners, have found that Tire Pressure Monitoring System (TPMS) in modern Cars can unintentionally expose Drivers to Tracking #Infosec #Privacy https://techxplore.com/news/2026-02-car-sensors-track.html

bsd.network

#infosec - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

Abaddon: an alternative Discord Client with Voice Support made with C++ and GTK 3, without Electron #OSS #Discord https://github.com/uowuo/abaddon

bsd.network

#oss - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

How to build and install the Electrum Bitcoin Wallet on OpenBSD - Short article by Aaron Miller @aaronm04@fosstodon.org #OpenBSD #Bitcoin ₿ https://iforgotmy.name/articles/2026-03-12-electrum-on-openbsd.html

bsd.network

#openbsd - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

A 27-year-old OpenBSD Vulnerability found in TCP SACK assessing Claude Mythos Preview’s Cybersecurity Capabilities ; other Bugs found in FFmpeg, FreeBSD NFS, Linux kernel... #OpenBSD #Infosec https://red.anthropic.com/2026/mythos-preview/

bsd.network

#openbsd - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

Interview de Roberto Di Cosmo à propos du projet « Software Heritage » (préservation du code source de logiciels) - Épisode du #Podcast Monde Numérique par Jérôme Colombain #Audio 🎧️ https://mondenumerique.info/podcast/monde-numerique/episode/pourquoi-il-faut-archiver-tous-les-logiciels-du-monde-roberto-di-cosmo-software-heritage

bsd.network
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Initial implementation of Ownership for the V programming language ; inspired by Rust that tracks owned values and prevents use-after-move bugs at compile time #Programming #Vlang https://github.com/vlang/v/blob/master/doc/ownership.md

bsd.network
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 8mo ago

Mandiant released an NTLMv1 Database (Rainbow Table) that will allow Defenders and Researchers (and, of course, malicious Hackers, too) to recover Passwords in under 12 Hours using Consumer Hardware costing less than $600 USD #Infosec #Passwords https://arstechnica.com/security/2026/01/mandiant-releases-rainbow-table-that-cracks-weak-admin-password-in-12-hours/

bsd.network

#infosec - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Pantone, l'histoire de l'étrange entreprise qui détient les couleurs du monde entier - Passionnante #Video par What a Fail ! https://youtu.be/1bf6daRS6P8

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago
Fairphone is recruiting a senior Software Engineer focused on embedded & Android Systems for their Software Engineering Team #Android https://fairphone.jobs.personio.com/job/2599490
fairphone.jobs.personio.com
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Bilan 1 an après la sortie de Saracroche, application mobile permettant de bloquer les spams téléphoniques - Bravo à Camille Bouvat pour cette app open-source respectueuse la vie privée https://cbouvat.com/blog/1an-saracroche/

cbouvat.com
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

FreeBSD on 2026 Google Summer of Code: NanoBSD Reimagined, Live-patching for the FreeBSD kernel, Native MPLS Support, Bluetooth Support for HID Devices... #GSoC #FreeBSD https://summerofcode.withgoogle.com/programs/2026/organizations/the-freebsd-project

bsd.network

#gsoc - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 13mo ago

6 major Password Managers with Tens of Millions of Users are currently vulnerable to unpatched Clickjacking Flaws that could allow Attackers to steal your Secrets - Public disclosure by Marek Tóth at DEF CON 33 #Infosec #Vulnerability https://socket.dev/blog/password-manager-clickjacking

bsd.network

#infosec - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Une très bonne synthèse sur la faille CopyFail impactant le noyau Linux : historique de la faille, mécanisme d'exploitation, gestion érratique de la divulgation, mitigation - par Linuxtricks #Infosec #Linux https://www.linuxtricks.fr/news/10-logiciels-libres/600-copy-fail-cve-2026-31431-synthese-technique-sur-cette-faille-linux/

bsd.network

#infosec - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 7mo ago

Les JdLL (Journées du Logiciel Libre) auront lieu à l'ENS Lyon les 30 et 31 mai 2026. L'appel à participation est ouvert jusqu'au 15 mars #OpenSource #Lyon https://www.jdll.org/

bsd.network

#opensource - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Researchers at the University of Southern California report a new Type of Electronic Memory Device that kept working reliably at 700 degrees Celsius 🔥 #Research #Electronics https://viterbischool.usc.edu/news/2026/03/usc-scientists-build-a-memory-chip-that-survives-temperatures-hotter-than-lava/

bsd.network

#research - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Credit Cards are Vulnerable to Brute Force Kind Attacks - Detailed article by Metin Ozyildirim #Infosec #Hacking https://metin.nextc.org/posts/Credit_Cards_Are_Vulnerable_To_Brute_Force_Kind_Attacks.html

bsd.network

#infosec - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 4mo ago

forjego-cli: an open-source CLI application written in Rust, for interacting with Forgejo (self-hosted lightweight software forge) https://codeberg.org/forgejo-contrib/forgejo-cli

codeberg.org
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 12mo ago

How to secure a Linux Server: an evolving How-To Guide ; Basics, SSH Server, Network, Audit... #Infosec #Linux https://github.com/imthenachoman/How-To-Secure-A-Linux-Server

bsd.network

#infosec - BSD Network

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 4mo ago
Boosted by @oxy@social.bsdlab.au
Import of LibreWolf browser in OpenBSD ports: modified version of Mozilla Firefox focused on privacy, security, and software freedom. Work by Leah Rowe @libreleah@mas.to (also author of Libreboot) #Firefox #OpenBSD https://marc.info/?l=openbsd-ports-cvs&m=178093524651764
marc.info
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 2mo ago
Quickly tested the Firefox Nightly version on my Linux desktop, not a huge fan of the UI modifications with rounded tabs and text inputs #Firefox https://blog.mozilla.org/en/firefox/new-firefox-design/
blog.mozilla.org
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 2mo ago
How to cut the Windows GDID (Global Device Identifier), the Tracker that follows you even through a VPN - Detailed Article and Powershell scripts available on GitHub, by Korben #Windows #Privacy https://korben.info/en/gdid-windows-cut-tracker-vpn.html
GDID Windows - Cut the tracker that follows you even through a VPN - Korben
Korben

GDID Windows - Cut the tracker that follows you even through a VPN - Korben

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

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 3w ago
Ken Thompson’s Trusting-Trust Attack is not limited to Compilers, this research paper shows that it can be constructed around GNU strip, an ordinary build utility that neither inspects nor generates source code #Research #Infosec https://arxiv.org/abs/2607.24888
Trusting-Trust Attack against an Entire Linux Distribution through Binary Manipulation
arXiv.org

Trusting-Trust Attack against an Entire Linux Distribution through Binary Manipulation

Ken Thompson's trusting-trust attack, in which a compromised compiler backdoors the programs it builds and reproduces the backdoor in subsequent rebuilds of itself, is widely regarded as a threat specific to compilers. We show that it is not. We construct a complete trusting-trust attack around GNU strip, an ordinary build utility that neither inspects nor generates source code, using only manipulations of finished ELF files. In the bootstrap of the NixOS Linux distribution, a single tampered st

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 1w ago
Boosted by @oxy@social.bsdlab.au
Introduction à Garage, solution open-source compatible S3, auto-hébergée et résiliente (support du multi-nœuds) - Article du magazine SysOps en libre accès (janvier 2026) #S3 #SysOps https://connect.ed-diamond.com/linux-pratique/lp-153/garage-l-alternative-libre-au-stockage-en-datacenter
connect.ed-diamond.com
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago
Replying to
@sebsauvage@framapiaf.org Le monde appartient à ceux dont les agents IA tournent toute la nuit 😉​
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 3mo ago
Boosted by @oxy@social.bsdlab.au
Replying to
@joel@gts.tumfatig.net Y'a pas de mystère, l'arbre de décision de tout ingénieur/bricoleur 😂​
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago
Replying to
@bortzmeyer@mastodon.gougere.fr Si jamais t'as besoin d'une élévation de privilèges sous Linux dans le futur 😉​, tu devrais trouver ton bonheur avec un des GTFOBins => https://gtfobins.org/
GTFOBins
gtfobins.org

GTFOBins

GTFOBins is a curated list of Unix-like executables that can be used to bypass local security restrictions in misconfigured systems.

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 2mo ago
Replying to
@elilla@transmom.love The most important thing in proposal A is that it does not forbid AI use in upstream projects and upstream patches/security fixes 😃​
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