.... wish I could tell you 'no'. It's not so much that servers would be left wide open to be hit by anything that plugged into the LAN (although, sure... some

.... wish I could tell you 'no'. It's not so much that servers would be left wide open to be hit by anything that plugged into the LAN (although, sure... some of that, too), but more that there was no need seen for things like endpoint firewalls on user desktop machines plugged in to the LAN, because they were 'behind the firewall'. And honestly even today we still see that thinking in datacenter ops and even virtual cloud ops. I've seen people say 'I don't need to worry about those mongo credential compromises because I'm running mongo on a secure VPC'.