I have been looking at hardening *nix servers for my lab and maybe carry some of that over to work. CIS benchmarks are something I like doing but that’s barely scratching the surface. What do you do for your servers?

I have Lynis, systemd-analyze, Kernel self protection in mind but I’d love to hear your thoughts. Bonus points for the most paranoid setups!

  • SayCyberOnceMore@feddit.uk
    2·
    5 days ago

    Would you use that on internal LAN connections or only external internet facing connections? I’m not aware (not checked) if any firewalls support it… not sure why?

    • iii@mander.xyz
      3·
      5 days ago

      With knockd you can execute arbitrary commands upon a port knocking sequence. So any application that is configurable via terminal is eligible. Here’s a tutorial of knockd+iptables (1). Alternativly there’s (2) that achieves the same effect in a different way.

      You can use it wherever, as part of security in depth. It’s essentially a pre-shared secret.

      It’ll have it’s largest effect on publicly facing interfaces. It does not replace having a proper ssh setup (disabling root, disabling password login, etc).