They're standardised zeroconnf protocols. Apple was part of the early development.
Bonjour is the apple implementation for mDNS.
Avahi is the GPL compliant implementation.
mDNS, llmnr (ms developed), have been known for ages to be vulnerable.
https://en.m.wikipedia.org/wiki/Zero-configuration_networking#Standardization
*I don't like apple
Remember when printers were connected by a USB cable?
Also, sudo ss -tunlp to see what ports are listening on your system and which applications/services use them. (Linux)
ss -K closes dead ports
If you didn't explicitly open a port, ask why it needs to be open (listening). (25, 22, 67, 53,5353)
Make sure what you did open is opened at the right addresses. Ie localhost, 0.0.0.0, 127.0.0.1, etc for the purpose.
Use a firewall and block ALL incoming traffic.
Mdns is something most people have no idea exists.
Oh, neat, all my devices broadcast all their open ports, services, addresses, hardware and names? Cool!
No.
Oh, this isn't about tRUmp's new crypto scam?
No problem.
The only reason i know this is because systemd throws degraded warnings because fwupd keeps failing. On several machines. (Because DNS, proxies, VPN, etc.)
In xfce there's a panel tool called genmon I use.
I have 2 specifically for monitoring systemd status
First is just the status
systemctl is-system-running
The other lists the failed units using a script
#!/bin/sh
failedd (){ systemctl --failed | grep -o -E "●.{0,35}\<failed" 2>/dev/null }
echo $(failedd)
Mint cinnamon has a similar "spice" (panel plugin) that I also use.
Probably because your hardware's firmware is up to date or there's nothing available.
It's rare that it's updated.
Check your journal or
systemctl status fwupd.service
fwupdmgr get-history
I don't get it.
Where's Saddam?
I'll head back to linuxmemes now.
On my living room setup hooked up to a projector:
mint xfce
sff tower
dual core
only 3GB ddr2. (One slot fried)
1080p via display port to HDMI
1tb HDD
Use 2 VPN. An sshd server
Myriad physical issues.
Old as fuck BIOS.
(Was released in 2009 or 2011?)
Memory is a bit of a pain sometimes. Mostly Firefox needs to be closed and reopened after system sleep.
I can watch 4 football games in HD with no real issue.
It is tweaked to high heaven in kernal and configs.
As long as it can work I will make it work.
There's a cave trail up near Collingwood in Ontario, Canada where it narrows so much I was deathly afraid of getting stuck. This is how I would imagine it.
This is a pic of one part I found.
I hated it.
I don't even know how fast I can type on a phone.
Even with word completion I find myself hesitating between the choice of word or typing it out.
I know it's not near as fast as on a physical keyboard where is used to be around 90-120 wpm if I remember correctly. (Been a while since I had to do that at an employment agency)
Anyway, it'd be fun to see a thumbs only tiktok/Snapchat typer vs a mechanical typewriter type off.
And, tbf, most people are far from tech savvy.
Most are consumers. Some are really good consumers. Some are power users. Some know how to do things.
Very few actually understand it.
But, there was a time where there was indeed a necessity if you used the tech, you had to understand it.
https://duckduckgo.com/?q=mdns+vulnerability&t=fpas&ia=web
https://book.hacktricks.xyz/generic-methodologies-and-resources/pentesting-network/spoofing-llmnr-nbt-ns-mdns-dns-and-wpad-and-relay-attacks