Meetups/Infra/2025-07-14

With a large crowd, discussed quad-1 outage, networking, tuis �in rust, gui-accelerated terminals, and dns attacks.

Introductions

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

• Loren
• Miko -- recovering mathematician, cryptographer, here to give you all pizza
• Kim -- warming a chair, hanging out & listening. Learn by osmosis. Working on Linux from scratch right now.
• Jet -- drone & .. guild. Maintain discord bot
• Elan -- hoping to, by end of meeting, figure out issues running podman in podman. Like not working my real project by finding other things instea. Yak-shave!
• Greg - programmer at day job,
• Chris -- designer day working on
• Yayoi -- worked as software engineer, nothing now, taking a break
• Alex -- ML
• Mattie (sp) -- computer, math person (in ex- sort of sense). Here to talk about compuuuter
• Cloud -- 5mof.net hosting -- happening this thursday
• Zacchae -- updating my phone this week -- so over
• Wheezy -- Grew up in palo alto and learning from youtube and into substances (looking to build CMG gyroscopes in satelights) Loves spreading germs in noisebridge by picking his nose
• Vampire - Do anything with GPUs

• interested in hardware level security, CHERI
• Eric -- like to provide stuff for use within the space, debug, looking for help debugging python scripts. <- try pudb https://pypi.org/project/pudb/

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!

Loren's desired topics:

   - Outage  -- 1.1.1.1 Cloudflare's DNS resolver -- Prefix announced by TATA briefly. Back up within 15 minutes
   - Performance Concerns
   - Lower level topics s.a. rattatoui

- Quad1 outage Cloudflare 1.1.1.1 (Possibly related) Observe that cloudflare https://bgp.tools/prefix/1.1.1.0/24 has an upstream Orange NTT https://arpanet.bandcamp.com/track/ntt-docomo https://radar.cloudflare.com/ https://www.netblocks.org https://ooni.org/ https://atlas.ripe.net/

https://sockpuppet.org/blog/2015/01/15/against-dnssec/ https://labs.ripe.net/author/stephen_strowes/visibility-of-ipv4-and-ipv6-prefix-lengths-in-2019/

(halp with intro notes plx)

BGP -- ASes --

Bit Squatting DefCon talk https://www.youtube.com/watch?v=9WcHsT97suU

ratatui and ratzilla orhun -- developer ratatui used in: https://github.com/ClementTsang/bottom

nostd (see related noalloc)

GhosTTY, alacritty, kitty,

NerdFont -- tool to "repair" other fonts, adding symbols missing in other fonts (intent) Commit mono

Takeaways

Cloudflare Radar anaomalies 
CIDR
MonkeyBrains -- thought it was so awesome, but it turns out it's just Another Corporate ISP (LLC)
More WASM, ratatui
better 

GPUs 
bitsquatting 
IP routing demystified CIDR -- nmap / fping -- cidr

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://cryptoisnotcryptocurrency.com/

Dan Kaminky's DNS attack (DEF CON 2008): https://www.youtube.com/watch?v=7Pp72gUYx00

How to Optimize a CUDA Matmul Kernel for cuBLAS-like Performance: a Worklog https://siboehm.com/articles/22/CUDA-MMM