It's hard Usually in Capture the Flag (CTF) challenges I get stuck when it comes to reverse engineering. I never really studied programming in assembly or c. Taking some time as part of the monthly Training Day at $dayjob as Infrastructure Engineer @ datacrunch to get a bit better at this …

Loihde had a great CTF :) It got me doing something physical and talking to people. I also got to learn about $MFT / some kind of NTFS metadata (also contained whole files if the files are small enough?) That it's very nice with a team. Case in point: I was trying …

At $Dayjob I have managed to with PCI passthrough pass in devices(GPU and IB) into a VM. But for some reason an all_reduce is still slow (1/10 with 2 full nodes in BM). First attempted layout was something like: upstream_port ^ downstream_port ^ ^ ^ ^ ^ GPU1 GPU2 GPU3 .. GPU8 IB1 IB2 IB3 …

I organized a cybersecurity workshop during my last few days at IQM. The attendees included: Myself, taking on more of a coaching role and solving some challenges in advance to provide hints. Some participants who had attended my previous events. a few that had previously tried and solved security challenges …

Slow Startup Does this happen on your computer? After starting start menu / task bar might become unresponsive After opening browser it takes a while (lots of seconds) before pages starts to load Try these things It is often/always DNS. Is one of the DNS server your computer is set …

It's hard to believe that it's already been four years since I first joined the team at IQM, completely new to the exciting world of Quantum Computing. It's been an incredible journey filled with learning, challenges, and a sense of accomplishment. Starting Fresh, Building Confidence The supportive environment at IQM …

What was going on? The wired network connection lost connection every now and then. Most of the time this didn't bother because buffering but sometimes it did annoy. This was on Raspian 11 and a raspberry 4. This was visible in dmesg -T output: [Mon Jan 22 20:48:23 …

Mitä tapahtui Langalla verkkoyhteys kotona katkkeili usein. Yleensä ei ollut ongelmä mutta pikkuhiljaa puskurointi ei auttanut enää. Tämä oli näkyvissä dmesg -T: [Mon Jan 22 20:48:23 2024] bcmgenet fd580000.ethernet eth0: Link is Down [Mon Jan 22 20:48:34 2024] bcmgenet fd580000.ethernet eth0: Link is Up …

Have you seen these error messages before? 10:22:23.481686Z Exceeded hard memory limit of 384 MiB with 400 MiB after servicing 3 requests total. Consider setting a larger instance class in app.yaml. 10:18:23.473577Z Exceeded hard memory limit of 384 MiB with 393 MiB after …

spoiler alert! Top 3 Position Competitor Alias Total Time to Solve 1 aretea 42 mins 13 secs 2 & 3 martbhell 47 mins 12 secs 2 & 3 mgubenko 47 mins 21 secs The challenges Recording from this event Chennai I was best! Took 21mins 28seconds Still 21 minutes was quite a …