Meetups/Infra/2025-05-26

(Preamble:

   = Meetup - Infra =
   https://www.noisebridge.net/wiki/Meetups/Infra
   https://www.noisebridge.net/wiki/Meetups/Infra/2024-..-.. )

2025-..-.. m Meetups/Infra

(TODO summary)

Introduction

Mark (new participants) - new to noisebridge, SWE person, interested in AI -- working on prototypes and moved to the yay area. Has a desktop server and willing to share two GPUs worth of compute Zacchae ayyyyyy - willing to demo a GUIX config, will host a demo later

-- Hardened Compute TCP

Daniel -- he's here Rainbow -- headless install Audio Intercept on the side Elan - Interested in reproducible builds.

GUIX DEMO

https://guix.gnu.org/

nix has intro drug:

   A declarative 
   Gueil nix

Unprivilenged package management guix-challenege

guix describe --format-channels # channels are the most fundamental definition "guix source tree"

Attractive uses of GUIX: Install it on an underlying OS and then use it as a package manager

Knowledge Gain: - General knowledge of Declarative - Web of Trust application to verify - Bazel https://bazel.build/ - How changes are made to the GUIX package - Appreciating the diff between NIX and GUIX (possible conversion)

Self Reference

NixOS and GUIX System

Use case: Customers can modify their system installation

Turtles on turtles on turtles: https://old.reddit.com/r/GUIX/comments/1bga82r/bazel_running_in_nix_running_in_guix/

Introductions

• [name] - [background]. [goals for meetup, or interests to explore]

• Loren -- Wants to set up a server for meetup chat
• Daniel -- not supposed to be here
• Zacchae -- other than phone number, I only use services I succeed in self-hosting
• [a person]
• Chris -- good front-end developer -- current interests:
• Sai (sp) -- backend eng, stumbling into the meetup
• Thereesa -- (2nd time)
• Nick -- interested in self-hosting (challenge: ask 2 questions)
• Dianna -- here - interested in infrastructure
• Greg -- interested in FOSS broadly, not working onanything today
• Mike - unemployed software engineer. Working on setting up services on my home k8s cluster.
• Doug -- terrible front- and back-end engineer -- here to chrome cast

(free ross)

Lesson or Demo

• Read aloud: clarify for meetup. We are taking notes in a riseup pad (or I am--help appreciated, and links). We have meeting notes posted to the wiki. noisebridge.net, search Infra, or Meetups/Infra. (the Infrastructure page has a disambiguation link.)
• Shell, web services, self-hosting, networking!

• platform questions -- full-stack development & use of platforms: Notion. Telegram.
  • telegram -- concerns
    • *lying* about their cryptography --

possibility of commercialization -

https://core.telegram.org/bots/api https://developers.notion.com/

• binary inspection

https://binsider.dev/ - rust + rataTUI https://github.com/ReFirmLabs/binwalk https://binvis.io/ https://github.com/sharkdp/hexyl rabin2 -I binary

1. 1. List information about binary

```shell $ rabin2 -I binary arch arm baddr 0x100000000 binsz 33512 bintype mach0 bits 64 canary false injprot false class MACH064 compiler clang [...] ```

• • dyld Cheatsheet**

========

1. 1. 1. Introduction

• `dyld` stands for "dynamic linker" or "dynamic link editor"
• Responsible for loading and linking dynamic libraries into running processes

1. 1. 1. Key Functions

• Loads dynamic libraries into memory
• Resolves symbol references between executables and libraries
• Performs relocations to adjust memory addresses
• Handles library dependencies

1. 1. 1. Benefits

• **Memory efficiency**: Shares dynamic libraries among multiple processes
• **Improved performance**: Loads libraries dynamically to reduce startup times
• **Simplified software development**: Enables independent updates of libraries and executables

1. 1. 1. Useful Commands

• `otool -L <executable>`: Inspect dynamic libraries used by an executable

   + Example: `otool -L /bin/ls`

• `dylib`: Work with dynamic libraries directly

   + Example: `dylib /usr/lib/libSystem.B.dylib`

1. 1. 1. Examples

Inspecting Dynamic Libraries ```bash $ otool -L /bin/ls /bin/ls:

   /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1234.0.0)
   /usr/lib/libc.dylib (compatibility version 1.0.0, current version 1234.0.0)

``` Working with Dynamic Libraries ```bash $ dylib /usr/lib/libSystem.B.dylib ```

otool -L /bin/ls

/bin/ls:

   /usr/lib/libutil.dylib (compatibility version 1.0.0, current version 1.0.0)
   /usr/lib/libncurses.5.4.dylib (compatibility version 5.4.0, current version 5.4.0)
   /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1351.0.0)

btop (htop, top, iotop), xxd (od),

mtr, traceroute, hping3

1. `hping3` - Advanced ping utility which supports protocols such TCP, UDP, and raw IP.

https://www.kali.org/tools/hping3/

1. 1. Ping an IP address over UDP on port 80

```sh hping3 --udp --destport 80 --syn ip_or_hostname ```

1. 1. Scan TCP port 80, scanning from the specific local source port 5090:

```sh hping3 --verbose --syn --destport 80 --baseport 5090 ip_or_hostname ```

IP addresses are assigned to:

• AS / ASNs (AS Number) https://en-wp.org/wiki/Autonomous_system_(Internet)

Much as domain names are leased to individuals to allow lookup of IP addreseses for servers, where poeple host the services they want to provide.

• loading executables

ldd -- macos dyld / dyld_info https://jmmv.dev/2023/07/ldd-untrusted-binaries.html

torsocks (macOS vs linux -- use different dynamic linkers)

strace -- statx / openat

1. List of tools to demonstrate practical uses of tools (Quick Reference Guides)

cht.sh -- hping https://cht.sh TLDR: https://tldr.sh/tlrc/ -

• dynamic linking

• security cryptography whatever

https://securitycryptographywhatever.com/episodes/

takeaways

• Doug -- more cht.sh
• Mike -- (silently) 5th amendment rights assertion. ebpf
• Greg -- cht.sh cool, would: live code nix
• Dianna -- tldr --
• Nick -- ASNs -- all the tools -- curious about self-hosting, curious about security
• Theresa -- binary analsis -- , cht.sh, TeleGram
• Jams -- lots of interesting thing
• Chris -- how IP addresses work
• -- binvis stuff
• Zacchae -- let's do a project uuuhhh. ideas for what you want. informational (want to: do more actual building.)

system crafters --

Questions, Discussion, or Coworking

• [Issue]

For next time

Readings & Exercises

• Readings
• Exercises

Join online

• Try it yourself!
  • Join libera.chat #nb-meetup-infra

https://www.noisebridge.net/wiki/Meetups/Infra

(Preamble:

   = Meetup - Infra =
   https://www.noisebridge.net/wiki/Meetups/Infra
   https://www.noisebridge.net/wiki/Meetups/Infra/2024-..-.. )

2025-..-.. m Meetups/Infra

(TODO summary)

Introductions

• [name] - [background]. [goals for meetup, or interests to explore]

• Loren -- background in
• Doug -- background: into self-hosting, into free, (as in beer? speech? yes).
• Jams --- he/him -- background in software, current interest in generally intelligent system
• -- here from spacebridge, learning cybersecurity. Was graphic designer at AirBNB, new to SF
• Teresa -- here via meetup, work at Apple. Internship at Apple, Vision Pro user testing, full stack bootcamp. Interested in vibe coding, SaaS. Lots of resources online.
• Zacchae -- limited participation, self-host email, matrix server, only centralized service I use is telephone (there I have rights). Want to host relays. Want more federated systems, easy to set up.
• James -- france, just arrived 3h ago. Building an app, in Rust, comparing lib-tos? tauri solutions. Github are have many open PRs. 3mo no activity.
• [Suhail hael?] -- building a startup, problem: insurance company, fighting denials. 25 healthcare client, 36k phone calls so far
• WE-Z -- hacker locale, teach swift, lockpicking, like making building & hacking. Interested tonight in infra, building ...
• Chris -- designer, full-stack dev -- working on AI poetry bot & SF events database
• Eric -- work at [], 3 years. Here to check-out the meetup.
• Noah -- first time here, SW intern @ LLNL, really into self hosting llms, now my own VPN.

Lesson or Demo

• Read aloud: clarify for meetup. We are taking notes in a riseup pad (or I am--help appreciated, and links). We have meeting notes posted to the wiki. noisebridge.net, search Infra, or Meetups/Infra. (the Infrastructure page has a disambiguation link.)
• Shell, web services, self-hosting, networking!

email servers

Hosting Zulip server https://zulip.com/

Organized chat for distributed teams

Interfaces well with email > you can email into it. Allows sending email + fully supported plugins.

• email

inbound mail: MX (A) for your site.

outbound mail: TXT spf: (sender policy frameworks") -- a: cname:  ? - DKIM (Domain-Key Identified Mail) -- DMARC (reporting)

• https://llm.datasette.io/en/stable/

• https://hn.algolia.com/?dateRange=all&page=0&prefix=true&query=local+first&sort=byPopularity&type=all

local-first software -- infra meetup (...)

localfirst links from jams:

- https://www.localfirstconf.com/
- https://replicache.dev/

obsidian? -- sync over network

https://gun.js.org -- local-first, decentralized, running in a browser (no binary needed)

? SimpleStore

Questions, Discussion, or Coworking

• [Issue]

For next time

Readings & Exercises

• Readings
• Exercises

Join online

• Try it yourself!
  • Join libera.chat #nb-meetup-infra

https://www.noisebridge.net/wiki/Meetups/Infra

(Preamble:

   = Meetup - Infra =
   nb.meetup.infra
   https://www.noisebridge.net/wiki/Meetups/Infra
   https://www.noisebridge.net/wiki/Meetups/Infra/2024-..-.. )

2025-04-28 m Meetups/Infra

(TODO summary)

Introductions

• [name] - [background]. [goals for meetup, or interests to explore]

Host nb infra to talk about ...

• Loren - past work as cloud engineer, want to talk about networking, cli and ai tools
• Zachie -- new to these listening in,
• Elan -- do lot of self-hosting, interested in automated deployments onto k8s
• Kevin -- lora testing of small devices, internal
• Som -- no bg in hosting or infra, intrested to learn, find out
• Doug -- here to learn about
• Chris -- designer, web engin
• Lauren -- infosec
• Jameson -- smart buoys, interest all network, LoRA & LTE
• Skanda - doing own infra
• Andy - doodler - loves art
• Prateek - interested to learn more
• Wolfe - Self hosting for a long time. Interested in lower complexity.
• Jams - he/him -- interested in general intelligence, and the fun conversations you have here
• Mike - software engineer. unemployed. Self hosting a kubernetes cluster at home. Need to set up a self cluster and CI/CD pipeline on Kubernetes. Laptop for secure stuff that can be taken overseas.
• Kevin. 🎤 It's been a while 🎤. Good to see you all.

Lesson or Demo

• Read aloud: clarify for meetup. We are taking notes in a riseup pad (or I am--help appreciated, and links). We have meeting notes posted to the wiki. noisebridge.net, search Infra, or Meetups/Infra. (the Infrastructure page has a disambiguation link.)
• Shell, web services, self-hosting, networking!

networking protocols

Reviewing networking protocols for the benefit of introduction to those not-in-the-know.

• OSI 7-layer dip rehash:
• Elan's purpose-based description of the networking stack.
• Wolf: objects to the OSI model as not being relevant anymore.
• Loren: discusses the SNAT operations involved in Jitsi communications.
• LoRa
• Jameson: discusses the [LoRa](https://en.wikipedia.org/wiki/LoRa) protocol, as the data link(?) layer.
• Elan: LoRA uses [chirp spread spectrum (CSS)](https://en.wikipedia.org/wiki/Chirp_spread_spectrum}
• Jameson: Had issues with exposing his router to the public, also with losing the session key.
• NB infrastructure
• Elan: Looking into [VS Code Server](https://code.visualstudio.com/docs/remote/vscode-server), wondering if it would be useful for the Python classes.
• Other potential FOSS techs:

 * self-hosted k8s would require 
 * https://ceph.io/en/
 * Reliable k8s cluster - should have 3x

• Mike's blog: https://blog.performantdata.com/2024/11/notes-install-kubernetes-on-debian.html
• Scalable web infra resources:
• https://github.com/jhuangtw/xg2xg?tab=readme-ov-file
• https://landscape.cncf.io/?selected=kind: full list of distributed systems tools (filter by open source)

• Wolf: ChatGPT just launched a "deep research" tool.

If we want to have a deeper LoRa conversation, Jameson would be happy to reach out to Joe Knapp (https://www.linkedin.com/in/joseph-knapp-a696568/) from Semtech, to come by for a technical dive.

Exponential backoffs? or Quadradic backoff. With jitter. Hosts backoff and try again.

Questions, Discussion, or Coworking

• [Issue]

For next time

Readings & Exercises

• Readings
• Exercises

Join online

• Try it yourself!
  • Join libera.chat #nb-meetup-infra

https://www.noisebridge.net/wiki/Meetups/Infra Add notes > nb.meetup.infra

https://github.com/nix-community/nixGL/

(Preamble:

   = Meetup - Infra =
   https://www.noisebridge.net/wiki/Meetups/Infra
   https://www.noisebridge.net/wiki/Meetups/Infra/2024-..-.. )

2025-04-21m Meetups/Infra

(TODO summary)

Introductions

• [name] - [background]. [goals for meetup, or interests to explore]

• Loren -- anubis. links. talk about infra, self-hosting, noisebridge infra
• Robert -- i like linux in the same way some people like football, parlays, head trauma,
• Wolf -- I self-host, playing this week with DuckDB
  • how do you deploy? dl, unzip, run it
• Jameson -- I run a small startup, host sites on cloudflare sites, hoped to work with Erikk tonight on Noisebridge LTE hosting, open-source network core, MAGMA core self-hosting. Terraform & K8s

- rob Q, does it have to be adapted to terraform and k8s? or could you deploy k8s on a server and do it "normally" - l: it's written for ubuntu 18? so,

• Greg -- programming, run some infra, anubis might be of interest for me
• Zaccy -- mostly sitting in, somewhat of a ... free software absolutist. Our compute is an extension of us. Interested in Noisebridge as a testbed of it, digital autonomy for it.
• Skanda -- interested in free software, have worked for big tech and startups. Using cloud does not seem sane, cost and control-wise, trying self-hosting. With AI tools -- can I replace SaaS tools. Would like to share some slides today.
• Chris, sitting in, designer, full-stacker -- hosted some services
• Sylvia -- self-described creature, , set up auth on CF Worker, hosted something on home server and put on internet in last month
• John -- quit corpo job recently, getting back in touch with OSS, linux. Scaffolding new learning with Obsidian, devops/sre experience
• Matty -- 18 taking a gap year, at NB for 2mo, here to observe
• Lukas -- Work on LLM visualization. Voxel rendering, mistral 7b. Pytorch, tensor ouotput. OpenGL bind and output.
• Grady -- in our day job, Lukas has developed a new post-training method.

Lesson or Demo

• anubis

• anubis -- on noisebridge.net
  • https://xeiaso.net/blog/2025/anubis/
  • https://github.com/TecharoHQ/anubis
• mcp -- authorization --

first solution https://defensiblesystems.substack.com/p/oauths-role-in-mcp-security

• https://github.com/rithik/bunnylol

• self-deployed auth / personal cookie customization

• • https://github.com/oauth2-proxy/oauth2-proxy
  • https://github.com/buzzfeed/sso

• duckdb -- ? & easy local analysis stack
  • Wolf -- for a few years, I've been running a search engine, search.feep.dev -- it's a big data engineering challenge

https://duckdb.org/ -- https://github.com/duckdb/duckdb --

similar to https://jupyter.org notebook, or https://marimo.io/ notbook

• Skanda -- slides?

https://meet.jit.si/nb-meetup-infra

• • Zero-trust approach, learned about it here.

• Lukas --
  • Model visualization

https://bbycroft.net/llm

https://github.com/valine https://x.com/lukasvaline

• • Transformer contenxt -- questions about tensor / matrix / vector (/ scaler) distinction, and use in

https://jalammar.github.io/illustrated-transformer/

Questions, Discussion, or Coworking

• [Issue]

For next time

Readings & Exercises

• Readings
• Exercises

Join online

• Try it yourself!
  • Join libera.chat #nb-meetup-infra

https://www.noisebridge.net/wiki/Meetups/Infra

====================================================================

https://github.com/nix-community/nixGL/

(Preamble:

   = Meetup - Infra =
   https://www.noisebridge.net/wiki/Meetups/Infra
   https://www.noisebridge.net/wiki/Meetups/Infra/2024-..-.. )

2025-04-07 m Meetups/Infra

(TODO summary)

Introductions

• [name] - [background]. [goals for meetup, or interests to explore]
• Robert - startup enthusiast
• Greg - has a job now, interested in computer infrastructure writ large
• Milan - first time here, background in infra/devops, crypto tech startup
• Evan - figuring out what's next
• Loren - running the meetup for 1 3/4 years
• Wolf - running lots of my own stuff for a long time, main personal project: writing a search engine, most recently: use IPv6 split routing for VPN / TLS-cert-issuance
• Jake - do backend engineering for work, gaming dev on the side
• Omelia - didn't come for this specifically, absorbing ambient knowledge, write C++ for games
• Robert - startup enthusiast, looking for work, cloud engineer
• Doug - give stanford MBA coders a bad name, amazing vibe coding
• TJ

-

Lesson or Demo

• what's still hard with ai tools?

giving them enough context to make a good decision

docker!

• claude couldn't figure out -- access to assets and static file, mount volumes in
• matomo (self-hosted google analytics)
• if you're outside the distribution, it'll try to push you toward it.

When will it take over dev ops?

• not yet
• claude code comparable? -- not encouraging. Too many mistakes, concerns.

not for devops

also, not for codebase, becomes llm sludge quickly

(by excitement) -- what has been most productivity enhancing Robert

repl.it agent -- not quite zero shot
qr code -- phone contorller -- phone to browser websocket rpc -- load emulator on browser 

https://qr-joysticker-r33drichards.replit.app/

with repl.it, can downlaod source, use in e.g. cursor, yourself, not locked in, in classic way.

Evan -- repl.it found helpful

nice to 

nice if you have an idea. you can stand up an idea, to show someone just before a call
liked cursor.

https://pure.md -- web parsed to md for llm
https://crawlspace.dev -- 

Agents question -- how bullish / bearish

11x -- uk co -- monthly ARR booked, with 30 day cancel, claimed (annual) ARR at $100M

would love to have autonomous grocery shop.

agents -- no
agents -- helped a lot by scaffolding
agentically generated: story games, idle clickers

agents working on tasks that can soft-fail

wolf example -- integration, takes months -- pdf, ledger.

PO box -- 

happy with / omelia -- wanted to drop points, vectors into a canvas. Prompted as such, worked well. One-shot, supervised ETL. Marchiing cubes algorithm example too.

loren: an experience, earlier on, with ... me using 3.5 to work myself up to writing it.

doug: ...

evan: git commits -- summary writing

facebook metrics (gaming) -- should rebase, optimal commit size. And LOC.

git rebase --exec  # pick, run cmd.  do tests, ensure working at each

cursor, windsurf, ...similar do autmoated commit between interactions

jujitsu -- does this

separate notion of change id vs commit.  changes can accumulate, commits can be constructed a bit later.
https://steveklabnik.github.io/jujutsu-tutorial/
https://github.com/jj-vcs/jj

greg -- llm success story, marginal. dioxus - rust library, make a thing that can display pdfs, sync position in doc, across desktop, web?, mobile.

https://dioxuslabs.com/learn/0.6/#
impressions from claude code -- ? properly/fully stuffing library into context?

claude code -- creating InDesign document,

next frontier for these tools: blender, CAD

buddy with startup, making foundation model creating all these things. Makes 3d models you can use. 

human in the loop, or human later

example of a human moving pixels in a doc
https://gwern.net/tool-ai

Robert example, copilot, useful -- 

success with tools? problems amenable to success with tools?

mcp servers -- - https://modelcontextprotocol.io/introduction

https://github.com/modelcontextprotocol/servers

proof of mcp

claude code -- compaction

1. it's all just a stream of tokens
2. but there's tool use -- and tool use stuffs (the relevant) tokens into context on demand
3. 

https://github.com/r33drichards/mcp-js

question -- about connecting, temporarily, arbitrarily -- behind-NAT servers, private database access to LLMs. NAT hole punching.

upload -- from computer. shuttle data home. private enc'd.

What lossy problems can you attempt?

fear and trembling by kierkegaard

outro infra question -- what might you work on in the next week?

• seeking secure computation people
• catch up with meetups -- hard to gather details -- meetups cli scarper, Milan
• contravening Ad*be terms of service and building an api
• greg - playing with tailscale
• add persistence to js mcp server. deno runtime in rust
• inkling of a lookup for, noisebridge --- wiki crypto meetup out of date
• omelia - graphics project --
• jake -- chess project, bit board, https://www.chessprogramming.org/Magic_Bitboards
• wolf -- aider?! try it out.

• https://cp4space.hatsya.com/2021/01/08/the-neural-network-of-the-stockfish-chess-engine/

infra chat?

• AI coding tools:

- https://aider.chat/ - claude code

(Preamble:

   = Meetup - Infra =
   https://www.noisebridge.net/wiki/Meetups/Infra
   https://www.noisebridge.net/wiki/Meetups/Infra/2024-..-.. )

2025-03-31 m Meetups/Infra

(TODO summary)

Introductions

• [name] - [background]. [goals for meetup, or interests to explore]\

• Loren -- infra,
• Eric -- talk about orchestrator on a node here -- excited about the cell network
• Jameson -- interested in cell network, LTE, and all things Helium.
• Jams -- listening from afar
• Chris -- kind of here, also not really
• Robert -- startup & infrastructure enthusiast, down to talk about clickhouse, ai scrapers -- anti-ai-scraper pro

Lesson or Demo

• Read aloud: clarify for meetup. We are taking notes in a riseup pad (or I am--help appreciated, and links). We have meeting notes posted to the wiki. noisebridge.net, search Infra, or Meetups/Infra. (the Infrastructure page has a disambiguation link.)
• Shell, web services, self-hosting, networking!

• AI scraping

RE: AI scrapers https://xeiaso.net/blog/2025/anubis/ https://github.com/TecharoHQ/anubis https://zadzmo.org/code/nepenthes/

• Robert questions -- how to deploy clickhouse as part of a high reliability tracing setup
  • https://docs.oxide.computer/guides/architecture/control-plane

qwen model for vl https://huggingface.co/spaces/lmarena-ai/chatbot-arena-leaderboard

https://blog.cloudflare.com/open-sourcing-openpubkey-ssh-opkssh-integrating-single-sign-on-with-ssh/ https://github.com/openpubkey/opkssh

Questions, Discussion, or Coworking

• [Issue]

For next time

Readings & Exercises

• Readings
• Exercises

Join online

• Try it yourself!
  • Join libera.chat #nb-meetup-infra

https://www.noisebridge.net/wiki/Meetups/Infra