Instability you ask? This is like a slow creep to instability and freeze your system. It’s called the Bash Fork Bomb (look it up if you want), but it’s a copy/paste you put in and it slows your system down by consuming all the system resources and cause it to lock up HARD. It goes away after a system reboot, though.

I was going to post the code here, but decided to play nice. But if you are curious:

https://itsfoss.com/fork-bomb/

(edit: Made ‘slow’ ‘slows’)

As a Gen X member who is 50 yrs old, a grandparent of two Grand kids, I never touched a computer until I was 12 years old (1986), this, I think gave me a head start into the computer world with an old Radio Shack Color Computer II (hooked up to my TV) with a Tape Drive to load programs with. With some of the older Gen X group starting to reach retirement age, I think we will probably have a larger portion of the population more adapted to computer than the Boomers before us. That’s not to say that during the 80’s and 90’s everyone was into computers though. The important thing was that schools had Timex Sinclair computers and mostly Apple II computers which were the workhorses even into my high school years in the early 90’s, so exposure to computer basics such as copy/paste and Word processing were certainly well know then!

I say all of this to mention that while right now, some of the older generation generally knows how to copy/paste, isn’t scared of breaking the computer and pretty much get a long fine with them. I’m more skilled than my peers in a lot of areas but that’s because I’ve used them non stop for so long and the others used them only in school but never saw the value until around Windows 98 or Windows 2000.

I believe there will be a shift of more computer literacy as the Millennials and Gen Z’s reach my age and older. The writers then may say that compared to the previous generation (ours), that they are miles ahead in their skills and literacy. Even my Grand kids are growing up with exposure to tablets and phones (VERY SPARINGLY), but also live out in the rural country so are getting great life exposure to great outdoors. :) (Ages 2 and 6). One can only dare to imagine what technology we may have 40-50 years from now when they reach my age range.

Anxiously waiting for ARCH to update their repos, they YANKED it from the unstable repo so I can’t cheat and download it early. :)

I use Technitium DNS as both my DHCP and DNS Server on my network. I then have my ISP Router’s DHCP turned off, and point the primary DNS IP To Technitium’s on my network. I have roughly 66-67 network devices at a given time on my network, mostly wireless. (Think wiFi locks, Lights, Outlets etc) then I have my phones and gaming systems an any given thing.

To manage my IP’s I use an Airtable type of database via BaseRow, also self hosted. Through my router’s records, I copied/pasted every single MAC address I found, into a column in my BaseRow table there, and then added the device name or friendly name to another with an assigned IP I want to use. I have a more organized system of ranges 192.168.1.1-10 is mobile devices, 192.168.1.11-30 is IoT etc…

By having my network setup in this fashion, I accomplish a few things, all new devices which power on or connect to the router to get their IP assignment fail to get it since it’s turned off there, and they search the network for an available DHCP Server which lands squarely on the TechnitiumDNS server and are assigned it through there. I also have adblocking enabled through the same server so I have a more home wide adblock which works. (You’d be amazed at how much Telemetry a TV Sends out for every single remote keypress!) I have been able to block those with the adblock enabled. With the DNS server, you can also assign DHCP ranges address, it is really an overly complex server and probably overkill for a home network. I’ve only scratched the surface of what it can do.

If you don’t want to fuss with TechnitiumDNS, there’s AdguardHome, or even PiHole you can use if you want to block Ads (or you can simply disable that function) and those also act as a DHCP Server.

Or, if you are wanting to spend a few hours configuring it, you could run your own DHCP Server in a VM or dedicated device such as a Raspberry Pi.

With all of these settings, it’s important to set your DHCP lease offer long enough that if you have to reboot the DHCP Server for kernel update, or it crashes, you won’t have any devices fail as some do regular polling to check for connectivity (My Linux computer does this a lot). I don’t remember if it’s KDE or Arch. Anyway, running the DNS Server also allows you to custom build your own “domain” system if you will. So could assign maybe your self hosted Calendar for example to http://calendar.local or http://calendar.internal.

By setting up a dedicated DHCP Server, using the manual method or one of the different AdBlock systems, you can also turn off DHCP registration for ‘foreign’ devices or those which aren’t in your DHCP table. This offers a small element of extra security for your WiFi, but it’s not 100% secure if someone knows your IP ranges and Subnet Mask. Also, this will make it easier in the future for you if you upgrade your router or replace it as there’s just two settings to change. (DCHP Server off and the optional self hosted DNS).

Why not use a different DDNS service? There are plenty out there. :) I think this may solve your issue. I’ve been using freemyip.com’'s for a while and have had no problem in the past issusing LetsEncrypt SSL’s. At the moment, I’m on Cloudflare tunnels so it’s automatic with them, which I know is a huge trust issue for a lot of people, but I don’t mind it for my stuff. But I do like to have my DDNS as a backup service from time to time.