John Opdenakker
@j-opdenakker.bsky.social
Blogger | #Infosec | #AppSec | Security awareness | Occasional Public Speaker | Cycling | Running | Posts might contain bad humor, sarcasm or irony | Takes your security seriously!
https://johnopdenakker.com
https://johnopdenakker.com
Pinned
John Opdenakker
@j-opdenakker.bsky.social
· Nov 15
Time to introduce myself properly here.
I'm John Opdenakker. I'm Belgian so I love some Belgian fries and a good Belgian beer from time to time. Following me here means you'll also have to tolerate my bad humor.
I'm John Opdenakker. I'm Belgian so I love some Belgian fries and a good Belgian beer from time to time. Following me here means you'll also have to tolerate my bad humor.
Let’s try this medium again. Who are the interesting and active posters on here?
November 15, 2025 at 12:26 PM
Let’s try this medium again. Who are the interesting and active posters on here?
Just started reading this one.
October 25, 2025 at 3:38 PM
Just started reading this one.
Someone asked me for a donation for their new swimming pool. so I gave them a glass of water.
October 12, 2025 at 11:59 AM
Someone asked me for a donation for their new swimming pool. so I gave them a glass of water.
Despite my poor AI prompting skills, this image looks quite as evil as the Shai-hulud npm attack, right?
September 21, 2025 at 10:47 AM
Despite my poor AI prompting skills, this image looks quite as evil as the Shai-hulud npm attack, right?
Reposted by John Opdenakker
ACME Protocol automates the issuance and renewal of SSL/TLS certificates, making web security management more efficient. Let's Encrypt uses the ACME. Now, nginx web server introduces native support for ACME protocol. No, need to download 3rd party script or certbot blog.nginx.org/blog/native-...
NGINX Introduces Native Support for ACME Protocol – NGINX Community Blog
blog.nginx.org
August 14, 2025 at 6:06 AM
ACME Protocol automates the issuance and renewal of SSL/TLS certificates, making web security management more efficient. Let's Encrypt uses the ACME. Now, nginx web server introduces native support for ACME protocol. No, need to download 3rd party script or certbot blog.nginx.org/blog/native-...
Intune is a little out of tune recently.
What a mess.
What a mess.
July 4, 2025 at 9:17 AM
Intune is a little out of tune recently.
What a mess.
What a mess.
When everybody is melting in Belgium it’s quite enjoyable here at 25 degrees.
Cheers 🍻
Cheers 🍻
July 1, 2025 at 2:31 PM
When everybody is melting in Belgium it’s quite enjoyable here at 25 degrees.
Cheers 🍻
Cheers 🍻
When 🤡 🤡 🤡 reign a country
Trump says "We might have to put DOGE on Elon", "DOGE is the monster that might have to go back and eat Elon", and "We'll have to take a look" at deporting Musk (Avery Lotz/Axios)
Main Link | Techmeme Permalink
Main Link | Techmeme Permalink
July 1, 2025 at 2:29 PM
When 🤡 🤡 🤡 reign a country
Just terrible. www.bbc.com/news/article...
NHS ransomware attack contributed to patient's death
An NHS trust in London confirms an unexpected patient death during the cyber attack on 3 June 2024.
www.bbc.com
June 26, 2025 at 12:43 PM
Just terrible. www.bbc.com/news/article...
The world is reigned by lunatics
June 22, 2025 at 9:24 AM
The world is reigned by lunatics
I'm my own worst critic. It's tiring. Very tiring...
No matter how much I try to convince myself that "good enough" is okay, I still don't act like it most of times.
I guess it's a long-time learning process.
Recognizable?
No matter how much I try to convince myself that "good enough" is okay, I still don't act like it most of times.
I guess it's a long-time learning process.
Recognizable?
June 11, 2025 at 7:57 AM
I'm my own worst critic. It's tiring. Very tiring...
No matter how much I try to convince myself that "good enough" is okay, I still don't act like it most of times.
I guess it's a long-time learning process.
Recognizable?
No matter how much I try to convince myself that "good enough" is okay, I still don't act like it most of times.
I guess it's a long-time learning process.
Recognizable?
Dear network, I'm currently building out my side gig. If you are looking for some information security expertise or you know a company who does, please let me know.
For more details about my advisory services, see reply.
Contact me via DM or johnopdenakker.com/contact/
Reposts appreciated!
For more details about my advisory services, see reply.
Contact me via DM or johnopdenakker.com/contact/
Reposts appreciated!
Contact
If you want to contact me please use one of the channels listed at the end of this page. As my time is valuable, I'll have to make a judgement and will only react to questions and requests I consider ...
johnopdenakker.com
June 10, 2025 at 5:16 PM
Dear network, I'm currently building out my side gig. If you are looking for some information security expertise or you know a company who does, please let me know.
For more details about my advisory services, see reply.
Contact me via DM or johnopdenakker.com/contact/
Reposts appreciated!
For more details about my advisory services, see reply.
Contact me via DM or johnopdenakker.com/contact/
Reposts appreciated!
Damn man, it's getting terrible recently. I get scam calls from all over the world. Why the sudden influx? Does anyone know/experience the same?
June 10, 2025 at 3:20 PM
Damn man, it's getting terrible recently. I get scam calls from all over the world. Why the sudden influx? Does anyone know/experience the same?
Chatgpt seems very much down at the moment. Does that mean that I need to be creative myself?
a close up of a robot 's head with a red light on it .
ALT: a close up of a robot 's head with a red light on it .
media.tenor.com
June 10, 2025 at 3:16 PM
Chatgpt seems very much down at the moment. Does that mean that I need to be creative myself?
The fight - ego clash - between Musk and Trump is both mouth watering and extremely sad.
a man in a suit and tie is eating popcorn and says " i 'm waiting "
ALT: a man in a suit and tie is eating popcorn and says " i 'm waiting "
media.tenor.com
June 6, 2025 at 6:08 AM
The fight - ego clash - between Musk and Trump is both mouth watering and extremely sad.
Someone still alive on this platform? Just let me know 😜
June 5, 2025 at 3:29 PM
Someone still alive on this platform? Just let me know 😜
Provider internet modem replaced by a new one. Let's hope my dodgy internet is finally fixed now. Non or poorly working internet is so frustrating.
June 5, 2025 at 3:08 PM
Provider internet modem replaced by a new one. Let's hope my dodgy internet is finally fixed now. Non or poorly working internet is so frustrating.
If you'd bought crowdstrike stock shortly after the incident of last year, you'd (almost) doubled your money.
June 2, 2025 at 7:14 PM
If you'd bought crowdstrike stock shortly after the incident of last year, you'd (almost) doubled your money.
If you're in Europe and you haven't objected to meta using your data for AI training purposes it's about time. You still have a little bit of time to do so before they start with it.
www.euronews.com/next/2025/05...
www.euronews.com/next/2025/05...
How to stop Meta from using your data to train its AI
At the end of May, Meta will start using Europeans’ data to train its AI. Here is how you can exercise your rights and prevent it.
www.euronews.com
May 26, 2025 at 8:23 PM
If you're in Europe and you haven't objected to meta using your data for AI training purposes it's about time. You still have a little bit of time to do so before they start with it.
www.euronews.com/next/2025/05...
www.euronews.com/next/2025/05...
My latest follower. Makes me think about good old Twitter times. Scambots a volonte
May 25, 2025 at 2:21 PM
My latest follower. Makes me think about good old Twitter times. Scambots a volonte
As this report highlights TU/e (University of Eindhoven) did a good job at IR, kudos to them for that.
Also yet another example that orgs get still hit through the weak spots and that this is often authentication (password/lack of MFA) related. 1/2
www.tue.nl/en/news-and-...
Also yet another example that orgs get still hit through the weak spots and that this is often authentication (password/lack of MFA) related. 1/2
www.tue.nl/en/news-and-...
‘TU/e acted well in cyber attack, but there are also learning points’
Investigation: perpetrators unknown, they were likely out for ransom.
www.tue.nl
May 19, 2025 at 9:34 AM
As this report highlights TU/e (University of Eindhoven) did a good job at IR, kudos to them for that.
Also yet another example that orgs get still hit through the weak spots and that this is often authentication (password/lack of MFA) related. 1/2
www.tue.nl/en/news-and-...
Also yet another example that orgs get still hit through the weak spots and that this is often authentication (password/lack of MFA) related. 1/2
www.tue.nl/en/news-and-...