SSH bastions and VPN are two standard ways to allow external clients access into an internal network, meaning salt is never exposed publicly. I read this as a

SSH bastions and VPN are two standard ways to allow external clients access into an internal network, meaning salt is never exposed publicly. I read this as a guideline that the salt master must not be exposed to the internet. Albeit could be better worded for a developer audience who doesn't understand bastions or VPN well.