Jörg Backschues @jbacksch
Making IT Infrastructure (in)visible, #network, #security, #email, #dns, off time #hiking & #cycling, member @FFRhein, @DENOGnews, @WikimediaDE, JM2C only backschues.de Essen, Deutschland Joined October 2009-
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📢 Ransomware Alert: 🇩🇪 BMW (bmw.com), has reportedly fallen victim to the Everest ransomware group.
Cloud Network Components Cheat Sheet: AWS vs. Azure vs. GCP 👇 Network components form the backbone of cloud infrastructure, enabling connectivity, scalability, and functionality in cloud services. We've simplified this for you. 55K+ read my DevOps and Cloud newsletter: techopsexamples.com/subscribe What do we cover: DevOps, Cloud, Kubernetes, IaC, GitOps, MLOps 🔁 Consider a Repost if this is helpful
OSI Model Clearly Explained The OSI model is a fundamental framework for understanding how network interactions occur. It comprises seven distinct layers, each with its own roles and responsibilities, working together to facilitate communication across systems and devices. 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗹𝗮𝘆𝗲𝗿 (𝗟𝟳) Interfaces directly with end-user applications to provide network services. It manages application-level protocols like HTTP, FTP, and SMTP, which enable services such as web browsing and email. 𝗣𝗿𝗲𝘀𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻 𝗹𝗮𝘆𝗲𝗿 (𝗟𝟲) Translates data between network and application formats. It manages data encryption, compression, and formatting. It maintains system interoperability by ensuring data is readable by both the sender and the recipient. 𝗦𝗲𝘀𝘀𝗶𝗼𝗻 𝗹𝗮𝘆𝗲𝗿 (𝗟𝟱) This layer manages the creation, maintenance, and termination of communication sessions between applications for efficient data transfer. Supports full-duplex and half-duplex communication to ensure proper sequencing and coordination in multi-way exchanges. 𝗧𝗿𝗮𝗻𝘀𝗽𝗼𝗿𝘁 𝗹𝗮𝘆𝗲𝗿 (𝗟𝟰) It coordinates end-to-end communication by delivering data to the correct application through ports, using either reliable delivery (TCP) or unreliable but faster methods (UDP). Error checking, flow control, and segmentation are used in the transport layer to achieve reliable data transfer. 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗹𝗮𝘆𝗲𝗿 (𝗟𝟯) Handles data routing, forwarding and addressing, determining the optimal path for data to reach its destination using protocols like IP and ICMP. 𝗗𝗮𝘁𝗮 𝗹𝗶𝗻𝗸 𝗹𝗮𝘆𝗲𝗿 (𝗟𝟮) Facilitates reliable data transfer across physical network links. Provides error detection and correction. Manages how data is placed onto the network medium. Uses protocols like Ethernet and PPP. 𝗣𝗵𝘆𝘀𝗶𝗰𝗮𝗹 𝗹𝗮𝘆𝗲𝗿 (𝗟𝟭) This layer forms the foundation of the OSI model, converting raw bitstreams into signals for transmission over physical media. It defines the hardware specifications for transmission, including the types of physical media that can be used, such as cables and wireless. It deals with electrical signals, cable types, and data rates. The OSI model is grounded in principles that support structured and predictable data movement. Each layer operates independently, simplifying design and troubleshooting. Data is encapsulated with headers as it moves down the layers and decapsulated as it ascends, preserving information integrity. By standardizing communication, this framework promotes system interoperability and supports global data exchange. ~~
OSI Model 101
chmod calculator with curl: curl cheat.sh/chmod/755
How SIEM Works?
maybe watch it when you're traveling to a certain hacker con..? OUT NOW: youtu.be/joHUPyb3ZwY
Switch ports can be categorized as trunk or access ports. Trunk ports handle traffic from multiple VLANs, while access ports typically carry traffic for only one VLAN 😎👇 #sysadmin #ccnp Find pdf books with all my #networking related infographics at study-notes.org
We've observed an interesting infection chain ⛓️ in the wild, starting with #LummaStealer spread through a fake gaming website and resulting in #Latrodectus and #SectopRat 🪲🔍👀 Infection starts with the user visiting a website offering free game downloads, where they are redirected and prompted to download a password-protected zip file from mega[.]nz ⚠️ When the user executes the file, Lumma is executed in a new process, which later downloads Latrodectus and SectopRAT: Latrodectus payload URL: 🌐 urlhaus.abuse.ch/url/3593620/ SectopRAT payload URL: 🌐 urlhaus.abuse.ch/url/3593619/ Latrodectus config 🗜️: CampaignID: Callisto Direction: 3 Version: 2.2 IOCs: 📡 threatfox.abuse.ch/browse/tag/Cal… 📡 threatfox.abuse.ch/ioc/1561162/ Malware samples: 📄 bazaar.abuse.ch/sample/426719a… 📄 bazaar.abuse.ch/sample/f1865f5… 📄 bazaar.abuse.ch/sample/0cfb4dc…
Firewall 101
Thoyroys @ThoyroysIiDO
51 Followers 260 Following
Alan DeKok @AlanDekok
31 Followers 165 Following CEO of @InkbridgeNtwrks, leader and co-founder of the @freeradius Project, and leading expert on Authentication, Authorization, and Accounting (AAA) frameworks.
InkBridge Networks @InkbridgeNtwrks
135 Followers 576 Following We engineer, support, and install foundational network solutions for authentication and network security.
Adamzzy @Adamzzy12
1 Followers 29 Following Account management,Prop firms pssage,mentorship,education https://t.co/t2RU7KRgST
Smorturqu @Smorturqu8CMNd
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Tabitha @TojairezN7Ca4
9 Followers 527 Following I wanted to make life a poem, sometimes simple, sometimes delicate. Unexpectedly, life has become my song, sometimes unreliable, sometimes out of tune.
Lightmeter @LightmeterIO
171 Followers 151 Following Email delivery monitoring and automation. Open Source. Empowering free and independent communication.
Sarto @Sartojs83
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desi @nayadesi2114
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Shuesot @ShuesotmET4O
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Mikhail Vasilyev @mixae1
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THIYAGARAJAN @Thiyagaraj007
26 Followers 1K Following Digital Marketing Analyst @ Trisul Network Analytics!
Zach Edwards @thezedwards
7K Followers 7K Following privacy & data supply chain research / Staff Threat Researcher @Infoblox / politico / #build🔥🕸 ρᔕ𝐞ỮĎ𝔬Ňʸ๓Øᵘ丂 / [email protected]
Bleyte @BleytemA5
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Dealil @Dealil183973
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Lismes @Lismes121789
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Jade Martin @Jade66986
276 Followers 4K Following project analyst,Every day is a ladder and a new step towards the set goal. Energy lovers like to pay attention to world energy problems.
Babak Farrokhi (@farr... @farrokhi
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Sandra canales @Sandracana73891
7 Followers 141 Following I'm a simple woman looking for a sincere man to love me the way I am. I am so much in love sex🥰
Alina @Alina3736978009
77 Followers 1K Following We should look at things with a positive and optimistic worldview, think dialectically, the breeze will blow around the hills
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ElastiFlow @ElastiFlow
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rene althoff @AlthoffRen64690
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1xd_542586 @testtwit123fd
274 Followers 5K Following Head of Threat Intelligence Team | Security Analyst | APT | AI Application | Malware Analysis | Global Security Market&Product, call me 1xd.
Defensorum @defensorum
30 Followers 100 Following All IT Security News! #ITSecurity #Cybersecurity #Databreach #Malware #ITRegulation 👉 https://t.co/gZ7rRQEUuW
RL @avdmax
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Sesesou @sesesou91623
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Jorgen Ute @HarrySaman7222
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Repooteighs @repooteigh92242
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mkswagger ☘️ 💻... @mkswagger_dev
132 Followers 802 Following secretly a ninja 🥷🏼.loves linux 🐧.dev 💻.science and tech 🔭⚛️📱
jj rokjan @rokjan
326 Followers 1K Following Informático, autodidacta en herramientas de Software Libre.
Lester van Houwelinge... @zadrotmedia
155 Followers 76 Following #SEO & GEO Specialist | Content and Copywriter | Punk | LinkedIn: https://t.co/9FeCMF2aSt
ISC - follow us on Ma... @ISCdotORG
4K Followers 754 Following #opensource Internet Infrastructure software; #BIND, Kea and #DHCP; operator of DNS root (F-root). Find us @[email protected], https://t.co/3NefcSQodx
Spambrella @Spambrella
8K Followers 7K Following Global cybersecurity company that protects corporate, data, people and brand against advanced email threats and compliance risks - [email protected]
Becky Rose @BeckyRose618074
3 Followers 172 Following
emailexpert @email_expert
11K Followers 3K Following Professional membership organisation for those in #email #CRM #deliverability & #privacy. Find our community on Linkedin
4NC13N7C0D3X @4NC13N7C0D3X
170 Followers 3K Following
Shivam Kumar Singh @MrRajputHacker
5K Followers 475 Following NGO Director https://t.co/534IpYYmta | Security Researcher
Sarath @Sarath_M32
28 Followers 3K Following
Ebou j @Ebou65001473
159 Followers 886 Following if you are not willing to work for it don't complain about not having it
DJ Wayne McCardle Bea... @DjWayneMccardle
358K Followers 276K Following Music Producer - Beat Maker - New Instrumentals beat every week - All Genres On all platforms @ https://t.co/wnMFyUdeME
MAS @massgravel
28K Followers 127 Following MAS: An open-source Windows/Office activator https://t.co/vxuSXKDxOJ
Troy Hunt @troyhunt
249K Followers 1K Following Creator of @haveibeenpwned. Microsoft Regional Director. Pluralsight author. Online security, technology and “The Cloud”. Australian.
English Quiz @Lexicanglo
149K Followers 77 Following Helping you improve your English 👨🏻🏫🇬🇧 Daily vocabulary, grammar, quizzes and tips 📖💡
Nuclei by ProjectDisc... @pdnuclei
38K Followers 183 Following Nuclei uses a vast templating library to scan applications, cloud infrastructure, and networks to find and remediate vulnerabilities.
English grammar @knowiiiedge
341K Followers 0 Following Learn English skills || Insightful Analysis || Communication || Vocabulary Building | | Grammar || Questions & Explanations!
Tom Dörr @tom_doerr
210K Followers 3K Following Follow for posts about GitHub repos, DSPy, and agents Subscribe for top posts DM to share your AI project (Due to volume of DMs I'll prioritize subscribers)
DirectoryRanger @DirectoryRanger
37K Followers 102 Following This account assembles and disseminates information related to Active Directory and Windows security.
LibreOffice @LibreOffice
80K Followers 274 Following The free and private office suite – successor to OpenOffice. But also a worldwide open source community! Follow us at https://t.co/ZHV7POmlzn
deleteme.com @deletemeco
733 Followers 11 Following Everyone leaves a digital trace. We facilitate our users in deleting their digital presence on the Internet.
Ruurtjan Pul @Ruurtjan
4K Followers 286 Following Full-time indie maker. • https://t.co/imB7t3axAJ • https://t.co/t3Cslnnmo9
Falconbricks | LEGO N... @Falconbricks
26K Followers 8 Following 🤝 Welcome to Falconbricks! 📰 LEGO News, Rumors & Leaks. 📬 Join our free Newsletter: https://t.co/wsTOZxUHQS
Dr. Peering @DrPeering
3K Followers 0 Following So tonight I'm gonna peer like it's nineteen ninety-nine DMs are open (for book deals and job offers)
Arcfunmi @Arcfunmi
209K Followers 2K Following Promoting Nigerian, African, &Global Architecture, Engineering, & Construction with focus on Technological Innovations in the AEC sector https://t.co/swPj6yGLPm
Christian Stadler Pho... @christadphoto
347 Followers 5 Following Lingerie & Fine Art Nude Photography
Route64 @Route64_org
105 Followers 263 Following IPv6 Tunnelbroker and transit provider for small networks. Completely free from the IPv6 community to the community! Check https://t.co/tIod5SKzAd
CLEAN CAR CLUB @TheCleanCarClub
755K Followers 49K Following We provide latest trends and professional car advice. Join our community of car enthusiasts. DM for promos or email: [email protected]
constanze buerger @constanzebuerge
309 Followers 377 Following Diplom-Informatikerin, ASO AC (ICANN) Council Member, Internet Community, Netzwerkarchitekturen und staatliche Souveränität, IP, ASN, DNS, IANA, RIPE
Kentik @kentikinc
9K Followers 8K Following Kentik is the network intelligence platform for modern infrastructure teams.
Doug Madory (also on ... @DougMadory
10K Followers 928 Following Director of Internet Analysis at @Kentikinc. Alum of @dynresearch @renesys @uva @dartmouth @usairforce
William Lam @lamw
37K Followers 463 Following Distinguished Platform Engineering Architect @Broadcom • 📢 Customer Advocate • 🧑💻 Technologist • 🖊️ Blogger • 👨👧👦 Father • 🧗♂️ Spartan Races
privacytests.org @privacytests
16K Followers 396 Following Open-source tests of web browser privacy. Developed and maintained by @arthuredelstein. Follow @privacytests for the latest browser test results!
The Royal Family @RoyalFamily
5.4M Followers 456 Following The latest news and updates on the work of The King, The Queen and The Royal Family.
Mailhardener @mailhardener
76 Followers 28 Following Mailhardener helps you secure and monitor your domain from being used for fraud and spam.
Axelle Ap. @cryptax @... @cryptax
6K Followers 288 Following Mainly about security, OS, mobile phones. The postings on this page are solely my own opinion and do not represent my employer.
@peekabooav@fosstodon... @peekabooav
66 Followers 80 Following This is also where we independently announce news about the https://t.co/seVwJelTM7 project
Interesting STEM @InterestingSTEM
757K Followers 99 Following Interesting and educative contents on Science, Technology, Engineering and Mathematics
onemarcfifty @onemarcfifty
675 Followers 4 Following digital creator #OpenWrt #Linux #Docker #Proxmox #VPN
Lightmeter @LightmeterIO
171 Followers 151 Following Email delivery monitoring and automation. Open Source. Empowering free and independent communication.
Caddy Web Server @caddyserver
10K Followers 102 Following Serving your sites over HTTPS+HTTP/3 automatically! EVERY SITE ON HTTPS. 👏 Visit our forum for help: https://t.co/lT4YYe7gz1 A @zerosslHQ OSS product.
Stalwart Labs @stalwartlabs
465 Followers 4 Following Secure, scalable mail & collaboration server with comprehensive protocol support. Follow us on Mastodon at @[email protected]
DNS4EU @DNS4EU
341 Followers 32 Following The official safe and private DNS resolver of the European Union. 🇪🇺 Project number: 101095329 21-EU-DIG-EU-DNS, Name: DNS4EU and European DNS Shield
CyberSHIELD | Cyberse... @cyb3rshi3ld
30K Followers 389 Following 🛡️ Most people fail in cybersecurity before they start. I fix that. Trusted by 30K+ learners. No fluff, just the path & skills to get you hired. Free system 👇
Tech Fusionist @techyoutbe
56K Followers 2K Following Turning Cloud & AI into actionable insights through visuals. 🛠️ Architecting 2026 with 56k+ engineers | Level up your skills. 📥 DMs open for partnerships.
IPCisco @ip_cisco
35K Followers 4K Following Network | Linux | Information Tech Cisco | Nokia | Huawei | Juniper https://t.co/BDidg6KDxA https://t.co/f7YpgsxTGm https://t.co/5Y5hc4xu3z Gokhan Kosem
Zorin OS @ZorinOS
34K Followers 90 Following The alternative to Windows and macOS designed to make your computer faster, more powerful, secure, and privacy-respecting.
COVID-19 Cyber Threat... @ThreatCoalition
1K Followers 0 Following Coalition of cybersecurity experts working to protect individuals and organizations from COVID-19-related cyber threats. | #CyberThreatCoalition #C19CTC
DNS Research Federati... @dns_rf
182 Followers 138 Following A centre of excellence, providing objective data on the internet's unique identifiers for academia, public safety and industry stakeholders.
World in Pictures @WorldnPictures
45K Followers 92 Following Explore The World in Pictures | The Most Diverse Travel Account on X Live and Work Remotely: https://t.co/0ik5zNqWdc
Ransomware News @RansomwareNews
31K Followers 0 Following This Twitter Bot gets updates from ransomware groups For removal requests DM @vxunderground Feed maintained by @joshhighet
d0nut 🦀 @d0nutptr
21K Followers 471 Following Security, software correctness, and Rust 🦀 prev: @RobinhoodApp, Cruise, @zellic_io, @Dropbox
Pepe Vila @cgvwzq
2K Followers 1K Following observer. my opinions are not mine and reflect those of your employer.
Architecture & Tradit... @archi_tradition
834K Followers 500 Following Old World Explorer | Sign up to my newsletter below👇
Babak Farrokhi (@farr... @farrokhi
1K Followers 279 Following Internet Plumber - #DNS, #BGP, #FreeBSD, #Infrastructure, #ThreatIntel, Distributed Systems






















