• 0 Posts
  • 14 Comments
Joined 6 months ago
cake
Cake day: March 28th, 2024

help-circle

  • I have declared war on notifications. My immediate family, two closest friends, and my boss can call me. In no other circumstances will my phone make a noise or vibrate. I will check my texts when I feel like it.

    Other than a few exceptions, no apps may show the notification badge either. Discord will show DMs and mentions from one or two servers. Everything else is blocked. My work email may show unread email. I’ve even turned off banners on my work chat app. I don’t think I’ve checked my personal email in months.

    All my recurring charges are paperless + autopay. That’s another notification badge I forgot about - I have a budgeting app that can show transactions. I categorize them, make sure their categories are covered, and I’m done.

    On the first of the month, I pay rent and set the budgeting app categories. Then I have nothing to worry about, and near-zero distractions. My biggest pain point in life is deciding what to eat for dinner.



  • Anything exposed to the internet will be found by the scanners. Moving ssh off of port 22 doesn’t do anything except make it less convenient for you to use. The scanners will find it, and when they do, they will try to log in.

    (It’s actually pretty easy to write a little script to listen on port 20 (telnet) and collect the default login creds that the worms so kindly share)

    The thing that protects you is strong authentication. Turn off password auth entirely, and generate a long keypair. Disable root login entirely.

    Most self-hosted software is built by hobbyists with some goal, and rock solid authentication is generally not that goal. You should, if you can, put most things behind some reverse-proxy with a strong auth layer, like Teleport.

    You will get lots of advice to hide things behind a vpn. A vpn provides centralized strong authentication. It’s a good idea, but decreases accessibility (which is part of security) - so there’s a value judgement here between the strength of a vpn and your accessibility goals.

    Some of my services (ssh, wg, nginx) are open to the internet. Some are behind a reverse proxy. Some require a vpn connection, even within my own house. It depends on who it’s for - just me, technical friends, the world, or my technically-challenged parents trying to type something with a roku remote.

    After strong auth, you want to think about software vulnerabilities - and you don’t have to think much, because there’s only one answer: keep your stuff up to date.

    All of the above covers the P in PICERL (pick-uh-rel) for Prepare. I stands for Identify, and this is tricky. In an ideal world, you get a real-time notification (on your phone if possible) when any of these things happen:

    • Any successful ssh login
    • Any successful root login
    • If a port starts listening that you didn’t expect
    • If the system watching for these things goes down (have two systems that watch each other)

    That list could be much longer, but that’s a good start.

    After Identification, there’s Contain + Eradicate. In a homelab context, that’s probably a fresh re-install of the OS. Attacker persistence mechanisms are insane - once they’re in, they’re in. Reformat the disk.

    R is for recover or remediate depending on who you ask. If you reformatted your disks, it stands for “rebuild”. Combine this with L (lessons learned) to rebuild differently than before.

    To close out this essay though, I want to reiterate Strong Auth. If you’ve got strong auth and keep things up to date, a breach should never happen. A lot of people work very hard every day to keep the strong auth strong ;)




  • There is no such thing as easy or hard.

    Give it a try, fuck it up, and give it a try again. Try not to fuck it up in the same way as the first time. Repeat until it works - it will work eventually.

    It took me about 6 hours and 3 disk re-formats my first time. I was particularly bad at it. I barely knew what a disk was, nevermind a partition.

    Actually I’m still not sure what a partition is.

    You’ll do fine :)


  • But MS teams is very secure! It’s sandboxed in a web browser :) It’s effectively a single-tab display of an entire ram-eating chromium process :)

    The only unfortunate side effect is that it can’t read your system default audio output, so it uses a cryptographically secure random number to decide which other audio output to use. That’s right - it very securely knows about all of your audio outputs, even though they aren’t the system default :)

    Did you just try to send someone a file? Don’t worry, I’ve put the file in sharepoint for you, and have sent them a link instead. Actually, wait - you had already sent that to someone else, so I sent file (1).docx instead. Actually wait - that was taken too. Now it’s file (2).docx.

    I would like to provide a friendly reminder that you will need to manage the file sharing permissions in sharepoint should anyone else join this 1-on-1 direct message chat :)