Systemd Service Hardening
Systemd Service Hardening

roguesecurity.dev
SystemD Service Hardening

cross-posted from: https://infosec.pub/post/32937284
This one is a little self-hosting specific, and more casual Linux best practices, but I've got a new blog post down for general security! Harden your systemd units (especially custom ones) for better peace of mind on the internet!
Adding
PrivateNetwork=yes
to your systemd units is a game changer for services that don't need network access - it completly isolates the service from the network and prevents any outbound connections.Good callout! You're absolutely right, and here I was primarily focused on publicly accessible services. Thanks for the addition.