So of course I have to ask...

What version of NFS are you running, and are you disallowing the older versions?

How are you handling user accounts? LDAP, Samba PDC (which is also LDAP), something else?

That is getting more and more outdated with each release.

Then Devuan or Fedora with SELinux would have given better security and performance.

The only thing OpenBSD protects you from is performance.

Their record speaks for itself.

“Only two remote holes in the default install, in a heck of a long time!”

Let's not forget how insecure linux is

Please stop sharing baseless claims.

Gnu/linux is the most audited os currently in use on this planet.

Thanks for the laugh