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How do you secure your home lab? (alien.top)

submitted 11 months ago by Ok_Plate_6961@alien.top to c/homelab@selfhosted.forum

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Started off by

Enabling unattended updates
Enable only ssh login with key
Create user with sudo privileges
Disable root login
Enable ufw with necessary ports
Disable ping
Change ssh default port 21 to something else.

Got the ideas from networkchuck

Did this on the proxmox host as well as all VMs.

Any suggestions?

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[–] gargravarr2112@alien.top 1 points 11 months ago (2 children)

Domain auth (1 place to set passwords and SSH keys), no root SSH
SSH by key only
Passworded sudo (last line of defence)
Only open firewall hole is OpenVPN with security dialled up high
VLANs - laptops segregated from servers
Strict firewall rules between VLANs
TLS on everything
Daily update check alerts (no automatic updates, but persists until I deal with them)
Separate isolated syslog server for audit trails
Cold backups

[–] mxrider108@alien.top 1 points 11 months ago (1 children)

What are the risks of passwordless sudo? Is it mainly just if someone has physical access to the machine or if you run a malicious program?

[–] gargravarr2112@alien.top 1 points 11 months ago

If someone or something malicious gets a shell account on my systems, then it at least stops them doing anything system-wide. And yes, if a script is going to request admin rights to do something, it'll stop right at the sudo prompt. Passwordless, it could do stuff without you even being aware of it.

Whether or not this is a line of defence at all is open to debate.