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Diego Córdoba 🇦🇷¿Alguien quiere aprender a configurar un sistema <a href="https://mstdn.io/tags/GNU" class="mention hashtag" rel="nofollow noopener" target="_blank">#GNU</a> <a href="https://mstdn.io/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> como un router de red?Si no lo vieron, hoy publiqué un nuevo video en el canal de youtube de <a href="https://mstdn.io/tags/juncotic" class="mention hashtag" rel="nofollow noopener" target="_blank">#juncotic</a>! Sí, realizando la práctica de configuraciones de Linux para convertirlo en un router de red.Para qué❓Para poder utilizarlo de firewall... digo, ya que estoy por publicar un curso de <a href="https://mstdn.io/tags/nftables" class="mention hashtag" rel="nofollow noopener" target="_blank">#nftables</a> 😜Espero que les guste y les sirva! ✨ 👇<a href="https://youtu.be/gcdIfT9fMNQ" rel="nofollow noopener" translate="no" target="_blank">https://youtu.be/gcdIfT9fMNQ</a><a href="https://mstdn.io/tags/learning" class="mention hashtag" rel="nofollow noopener" target="_blank">#learning</a> <a href="https://mstdn.io/tags/softwarelibre" class="mention hashtag" rel="nofollow noopener" target="_blank">#softwarelibre</a> <a href="https://mstdn.io/tags/opensource" class="mention hashtag" rel="nofollow noopener" target="_blank">#opensource</a> <a href="https://mstdn.io/tags/freesoftware" class="mention hashtag" rel="nofollow noopener" target="_blank">#freesoftware</a> <a href="https://mstdn.io/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> <a href="https://mstdn.io/tags/devops" class="mention hashtag" rel="nofollow noopener" target="_blank">#devops</a>

pluhmenIch wollte auch gern noch OpenWRT endlich mal von der 22 auf die 23er bzw. gleich auf die 24er Version aktualisieren.Dass sich das Netzwerkmanagement von swconfig auf DSA mit der Version 21 geändert hatte, hatte ich auf den Mikrotik Routern gar nicht bemerkt. Einige Geräte wurden weiterhin mit swconfig betrieben. Mit der Version 23 ändert sich das hier ebenfalls.D.h. für mich, dass meine gebauten Images mit dem Imagebuilder zwar durch gehen, aber nicht mehr installiert werden können. Außer man zerhaut sich die Netzwerkkonfiguration und hat die Teile in einem nicht funktionsfähigen Zustand.Und weil ich partout keine Lust auf kaputtes produktives Netzwerk habe, um im Anschluss daran alles wieder zum Laufen bringen zu müssen, habe ich mir eine weiteren hap ac2 bestellt, mit dem ich dann ganz in Ruhe die Transition zu DSA für beide bestehenden Geräte machen kann.<a href="https://kanoa.de/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> <a href="https://kanoa.de/tags/OpenWrt" class="mention hashtag" rel="nofollow noopener" target="_blank">#OpenWrt</a> <a href="https://kanoa.de/tags/Sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#Sysadmin</a>

dan_nanniThe grep command — my all-time favorite in Linux — is like a spotlight for text. It instantly finds words, phrases, or patterns inside files or streams with precision and speedHere is a quick grep cheatsheet to power up your searches 😎👇 <a href="https://mastodon.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> <a href="https://mastodon.social/tags/devops" class="mention hashtag" rel="nofollow noopener" target="_blank">#devops</a>Find high-res pdf books with all my <a href="https://mastodon.social/tags/linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#linux</a> and <a href="https://mastodon.social/tags/cybersecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#cybersecurity</a> related infographics from <a href="https://study-notes.org" rel="nofollow noopener" translate="no" target="_blank">https://study-notes.org</a>

mortDid you know? If you use materialized views in <a href="https://floss.social/tags/postgresql" class="mention hashtag" rel="nofollow noopener" target="_blank">#postgresql</a>, you ... probably can't restore backups created by pg_dumpI just hit this. Had materialized views which assumed that the search path was set to 'public' (which is the default, it's the schema all your tables are).Upon restoring, the search path is cleared. Then materialized views are refreshed. This fails, because the search path isn't set to 'public'.This is horrifying... <a href="https://floss.social/tags/databases" class="mention hashtag" rel="nofollow noopener" target="_blank">#databases</a> <a href="https://floss.social/tags/postgres" class="mention hashtag" rel="nofollow noopener" target="_blank">#postgres</a> <a href="https://floss.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a>

WulfyLook, it's nonsense that <a href="https://infosec.exchange/tags/AI" class="mention hashtag" rel="nofollow noopener" target="_blank">#AI</a> dumbs down your skills and critical reasoning... ... Just look at my latest <a href="https://infosec.exchange/tags/vibecoding" class="mention hashtag" rel="nofollow noopener" target="_blank">#vibecoding</a> (<a href="https://infosec.exchange/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a>)# 🦍 **APE TALK VERSION**---## 🍌 **WHAT HAPPENED****Before Mautic:** - All containers live in same house - cAdvisor can peek in all rooms - Everything works ✅**After Mautic:** - Mautic gets own separate house (`srv_default` network) - cAdvisor tries to peek in Mautic's house - **DOOR LOCKED** 🚪🔒 - cAdvisor: "Cannot read smaps" (can't see inside) - Spams error 1000 times - Prometheus sees errors mixed with data - Prometheus: "WTF is this?" - **Graphs die** 💀---## 🔧 **THE FIX**Give cAdvisor **master key** to all houses:```yaml privileged: true # ← Master key devices: - /dev/kmsg # ← Security badge ```Now cAdvisor can see into **all** houses, even isolated ones.---## 🎯 **WHY IT WORKED BEFORE**- One house = no locks needed - Multiple houses = need master keyYou never needed master key until you built second house (Mautic network).---## ⚡ **DO THIS**1. Edit compose file 2. Add `privileged: true` to cAdvisor 3. Add `/dev/kmsg` device 4. Restart: `docker-compose up -d cadvisor` 5. **Graphs come back** 📈---**TL;DR: Mautic made new network house. cAdvisor needs key to see inside. Add key. Fixed.** 🦍✅

Like Mucas :pumpkin_laugh:One hour left to get the "Networking for System Administrators, 2nd ed" special version, or the cover painting! Or just get the book before retailers. <a href="https://io.mwl.io/tags/kickstarter" class="mention hashtag" rel="nofollow noopener" target="_blank">#kickstarter</a> <a href="https://io.mwl.io/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> <a href="https://mwl.io/ks" rel="nofollow noopener" translate="no" target="_blank">https://mwl.io/ks</a>

Diego Córdoba 🇦🇷Hola comunidad! 👋📚 Pregunta de examen de la semana!Relacionada con el nuevo curso que estamos por publicar, y con el contenido compartido esta semana... veamos si prestaron atención 🤓❓ ¿Qué diferencia hay entre SNAT y MASQUERADE en firewalls como iptables/nftables?Qué opinan? 💬El viernes publico el feedback! Estén atentos ✨<a href="https://mstdn.io/tags/gnu" class="mention hashtag" rel="nofollow noopener" target="_blank">#gnu</a> <a href="https://mstdn.io/tags/linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#linux</a> <a href="https://mstdn.io/tags/juncotic" class="mention hashtag" rel="nofollow noopener" target="_blank">#juncotic</a> <a href="https://mstdn.io/tags/educacion" class="mention hashtag" rel="nofollow noopener" target="_blank">#educacion</a> <a href="https://mstdn.io/tags/softwarelibre" class="mention hashtag" rel="nofollow noopener" target="_blank">#softwarelibre</a> <a href="https://mstdn.io/tags/opensource" class="mention hashtag" rel="nofollow noopener" target="_blank">#opensource</a> <a href="https://mstdn.io/tags/freesoftware" class="mention hashtag" rel="nofollow noopener" target="_blank">#freesoftware</a> <a href="https://mstdn.io/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> <a href="https://mstdn.io/tags/devops" class="mention hashtag" rel="nofollow noopener" target="_blank">#devops</a> <a href="https://mstdn.io/tags/tcpip" class="mention hashtag" rel="nofollow noopener" target="_blank">#tcpip</a> <a href="https://mstdn.io/tags/firewall" class="mention hashtag" rel="nofollow noopener" target="_blank">#firewall</a> <a href="https://mstdn.io/tags/nat" class="mention hashtag" rel="nofollow noopener" target="_blank">#nat</a> <a href="https://mstdn.io/tags/snat" class="mention hashtag" rel="nofollow noopener" target="_blank">#snat</a> <a href="https://mstdn.io/tags/masquerade" class="mention hashtag" rel="nofollow noopener" target="_blank">#masquerade</a> <a href="https://mstdn.io/tags/iptables" class="mention hashtag" rel="nofollow noopener" target="_blank">#iptables</a> <a href="https://mstdn.io/tags/nftables" class="mention hashtag" rel="nofollow noopener" target="_blank">#nftables</a> <a href="https://mstdn.io/tags/netfilter" class="mention hashtag" rel="nofollow noopener" target="_blank">#netfilter</a>

StarbeamrainbowlabsTIL that one can publish a docker port to localhost instead of the default external interface (e.g. if you wanna put it behind a reverse proxy etc) like so:```bash sudo docker run -it --rm --publish 127.0.0.1:5000:5000 --name registry registry:3 ```...this example using the default docker private registry image.It's in the form `IP:HOST_PORT:CONTAINER_PORT`, where `IP` is the IP address of the network interface to bind to.Kewl!<a href="https://fediscience.org/tags/Docker" class="mention hashtag" rel="nofollow noopener" target="_blank">#Docker</a> <a href="https://fediscience.org/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> <a href="https://fediscience.org/tags/Networking" class="mention hashtag" rel="nofollow noopener" target="_blank">#Networking</a> <a href="https://fediscience.org/tags/Sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#Sysadmin</a> <a href="https://fediscience.org/tags/HomeLab" class="mention hashtag" rel="nofollow noopener" target="_blank">#HomeLab</a> <a href="https://fediscience.org/tags/MyHomeLabClusterIsBrokenAndIAmRebuildingItUsingNixOS" class="mention hashtag" rel="nofollow noopener" target="_blank">#MyHomeLabClusterIsBrokenAndIAmRebuildingItUsingNixOS</a> <a href="https://fediscience.org/tags/LongHashtagsAreKewl" class="mention hashtag" rel="nofollow noopener" target="_blank">#LongHashtagsAreKewl</a>

Like Mucas :pumpkin_laugh:The "Networking for System Administrators" <a href="https://io.mwl.io/tags/kickstarter" class="mention hashtag" rel="nofollow noopener" target="_blank">#kickstarter</a> is on its last day. Back this book, get four <a href="https://io.mwl.io/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> ebooks!<a href="https://mwl.io/ks" rel="nofollow noopener" translate="no" target="_blank">https://mwl.io/ks</a> The last stretch goal got broke late yesterday. Today, it's jumped halfway to the next one. It might--MIGHT--fall, making the reward FIVE books?

Stefano MarinelliDon't ask me why, but I'm not happy:<a href="https://uk.finance.yahoo.com/news/qualcomm-to-acquire-arduino-amid-edge-computing-push-130012919.htm" rel="nofollow noopener" translate="no" target="_blank">https://uk.finance.yahoo.com/news/qualcomm-to-acquire-arduino-amid-edge-computing-push-130012919.htm</a><a href="https://mastodon.bsd.cafe/tags/IT" class="mention hashtag" rel="nofollow noopener" target="_blank">#IT</a> <a href="https://mastodon.bsd.cafe/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#SysAdmin</a>

:evdonia_corner_emblem: Amélia Bjórnsdottir/Ursidíno (she, they)Has there been a fibre line cut somewhere in the US? <a class="hashtag" href="https://bv.umbrellix.org/tag/lang_en" rel="nofollow noopener" target="_blank">#lang_en</a> <a class="hashtag" href="https://bv.umbrellix.org/tag/sysadmin" rel="nofollow noopener" target="_blank">#Sysadmin</a>

JordanThe importance of out-of-band server and network management is at its peak when one must use it.<a href="https://defcon.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> <a href="https://defcon.social/tags/networking" class="mention hashtag" rel="nofollow noopener" target="_blank">#networking</a>

Like Mucas :pumpkin_laugh:indexing <a href="https://io.mwl.io/tags/n4sa2e" class="mention hashtag" rel="nofollow noopener" target="_blank">#n4sa2e</a> and came across this tidbit. <a href="https://io.mwl.io/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> <a href="https://io.mwl.io/tags/understatement" class="mention hashtag" rel="nofollow noopener" target="_blank">#understatement</a> <a href="https://mwl.io/ks" rel="nofollow noopener" translate="no" target="_blank">https://mwl.io/ks</a>

Like Mucas :pumpkin_laugh:Nine hours left to back this one <a href="https://io.mwl.io/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> book and get three bonus ebooks.<a href="https://www.kickstarter.com/projects/mwlucas/networking-for-system-administrators-2nd-edition" rel="nofollow noopener" translate="no" target="_blank">https://www.kickstarter.com/projects/mwlucas/networking-for-system-administrators-2nd-edition</a> <a href="https://io.mwl.io/tags/n4sa2e" class="mention hashtag" rel="nofollow noopener" target="_blank">#n4sa2e</a>

Daniel ColquittYesterday's <a href="https://colquitt.xyz/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#SysAdmin</a> task of moving my ElasticSearch node to a new VPS seems to have completed overnight without any disasters.

Like Mucas :pumpkin_laugh:Tonight at 9PM EDT, I get to shut the hell up.Until then, I gotta say: the "Networking for Sysadmins" <a href="https://io.mwl.io/tags/Kickstarter" class="mention hashtag" rel="nofollow noopener" target="_blank">#Kickstarter</a> is on its last day. All backers get four bonus <a href="https://io.mwl.io/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> ebooks! <a href="https://www.kickstarter.com/projects/mwlucas/networking-for-system-administrators-2nd-edition" rel="nofollow noopener" translate="no" target="_blank">https://www.kickstarter.com/projects/mwlucas/networking-for-system-administrators-2nd-edition</a>

FLOX AdvocateIn brazen jungle marketing move <a href="https://io.mwl.io/@mwl" class="u-url mention" rel="nofollow noopener" target="_blank">@mwl</a> reminds us you can get viruses from BSD [conferences][0]While considering his security books remember he has a kickstarter for the next version of his networking for sysadmins book[1]His books are delivered secured in plain brown cardboard to protect them from viruses while in the postal netBut also wear a mask and get vaccinatedYou can even buy the coverENDS TUESDAY[0] <a href="https://mastodon.social/@mwl@io.mwl.io/115306447433635372" rel="nofollow noopener" translate="no" target="_blank">https://mastodon.social/@mwl@io.mwl.io/115306447433635372</a>[1] <a href="https://mastodon.social/@mwl@io.mwl.io/115329295183837529" rel="nofollow noopener" translate="no" target="_blank">https://mastodon.social/@mwl@io.mwl.io/115329295183837529</a><a href="https://floss.social/tags/networking" class="mention hashtag" rel="nofollow noopener" target="_blank">#networking</a> <a href="https://floss.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a>

Julian OliverPleased to announce new dates for the next round of the Tunnel and Fortress training series. <a href="https://learn.nikau.io/courses/course-v1:Nikau+TF2+2025_T4/about" rel="nofollow noopener" translate="no" target="_blank">https://learn.nikau.io/courses/course-v1:Nikau+TF2+2025_T4/about</a>If you would like to bring carefully secured self-hosted sovereign server infrastructure to your communities, movements and/or orgs - getting them off BigTech and onto a happier & healthier platform surface - these courses are probably for you.These will be the last Tunnel and Fortress sessions of the year as I work to finish a self-paced offering.<a href="https://mastodon.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> <a href="https://mastodon.social/tags/selfhosting" class="mention hashtag" rel="nofollow noopener" target="_blank">#selfhosting</a>

Graylog👋 Hey IT pros, security analysts, and sys admins! Have you taken advantage of <a href="https://infosec.exchange/tags/graylog" class="mention hashtag" rel="nofollow noopener" target="_blank">#graylog</a>'s FREE analyst training, yet? The Graylog Academy is here for you. 🫵 It's designed from the ground up by internal Grayloggers and experts, and anyone can sign up for it. 🎉This comprehensive on-demand training program covers a wide range of topics, ensuring participants gain a deep understanding of the platform and its capabilities. And for every test you pass you get a Graylog certificate! 🌟Learn about: 🔍 Search fundamentals 📊 Graylog dashboards 🪵 Log ingestion 💡 Pipelines, parsing and the Graylog information model 👁️ Dashboards and visualization 🔒 Intro to API security ➕ More!Enroll here! ⤵️ <a href="https://graylog.org/post/graylog-academy-free-training-available/" rel="nofollow noopener" translate="no" target="_blank">https://graylog.org/post/graylog-academy-free-training-available/</a> <a href="https://infosec.exchange/tags/ITPro" class="mention hashtag" rel="nofollow noopener" target="_blank">#ITPro</a> <a href="https://infosec.exchange/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#SysAdmin</a> <a href="https://infosec.exchange/tags/securityanalyst" class="mention hashtag" rel="nofollow noopener" target="_blank">#securityanalyst</a> <a href="https://infosec.exchange/tags/cybersecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#cybersecurity</a> <a href="https://infosec.exchange/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#security</a>

Like Mucas :pumpkin_laugh:"Networking for System Administrators" broke another stretch goal, so all backers get four <a href="https://io.mwl.io/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#sysadmin</a> books!<a href="https://mwl.io/ks" rel="nofollow noopener" translate="no" target="_blank">https://mwl.io/ks</a>One day remains. It might--MIGHT--go up to five books? Dunno.

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