I used to have all VMs in my QEMU/KVM server on their own /30 routed network to prevent spoofing. It essentially guaranteed that a compromised VM couldn’t give itself the IP of say, my web server and start collecting login creds. Managing the IP space got painful quick.
this post was submitted on 06 Feb 2024
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I am clearly not paranoid enough. For a while I was running an open source router inline between the network AP and the fiber to Ethernet box and running nids but the goddamn thing kept crapping out every few days so i took it back out until I can find a more stable solution.
I have plans if I can ever get around to it. I want the smart TV, printer and other shitty things on a separate network from the more trusted devices. I don't know how yet but I would like to set up 802.1X for the trusted stuff.
You could not connect the TV and printer to the network but instead attach them to raspberry Pi or similar devices. This allows you full control and stops them calling home and spying.
My security is fairly simplistic but I'm happy with it
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software protection
- fail2ban with low warning hold
- cert based login for ssh (no password Auth)
- Honeypot on all common port numbers, which if pinged leads to a permanent IP ban
- drop all firewall
- PSAD for intrusion/scanning protection (so many Russian scanners... lol)
- wireguard for VPN to access local virtual machines and resources
- external VPN with nordVPN for secure containers (yes I know nord is questionable I plan to swap when my sub runs out)
-
physical protection
- luksCrypt on the sensitive Data/program Drive ( I know there's some security concerns with luksCrypt bite me)
- grub and bios locked with password
- UPS set to auto notify on power outage
- router with keep alive warning system that pings my phone if the lab goes offline and provides fallback dns
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things I've thought about:
- a mock recovery partition entry that will nuke the Luks headers on entry (to prevent potential exploit getting through grub)
- removing super user access completely outside of local user access
Tinyssh in a ssh user, su from there. I see privilege management in openssh as potential vulneranility.
npftables blocks all incoming except a particular set of ips. any connections from those ips hit pubkey authentication.
I've never had a problem