I would say there are better methods to solve this problem these days than a script. Check out Ansible or NixOS.

Put your external facing services behind the VPN, or at least put them in a separate VLAN that’s firewalled in such a way that they can’t reach the rest of the network if they become compromised.

I would advise that you instead also connect the Windows machine to the VPS with WireGuard as 10.1.0.3, basically mirroring what you’ve done on the Ubuntu server. The routing will be a mess otherwise. Another option is running the WireGuard tunnel on your gateway with something like OPNsense.

Does the machine running the WireGuard tunnel to the VPS acts as a “router” aka gateway for the network? Otherwise the windows machine doesn’t have a return path for the connection.

S920

I’m running this as my router. It handles a 500/500mbit connection over WireGuard for me without a problem. CPU usage can spike up to 80% when I push it as much as I can, so depending on how it scales I’m not 100% sure how it would handle 1gbit routing+vpn for example.

Same! Which version do you use? Small or big?

Backup your data regularly and the risk should be very small.

It’s a good way to see if someone has cracked your WiFi password for example so why not. Doesn’t add much security but better than nothing.

ClamAV is an anti-virus software that you would run on end-devices to scan files, an intrusion detection scans network traffic to detect anything potentially malicious. I don’t know your exact router model but I suspect it’s way too weak to run intrusion detection. If you have a switch that’s capable of mirroring you could use that to utilize a more powerful machine to scan network traffic.