It's off topic, but in my consulting and networking, security/firewall appliances are an easy first line approach I see companies buy in to. The security sales pitch sounds good and makes you feel good. Cannot name names.

I mean, everybody has a perimeter, even the ZT believers, but I think the notion of large networks protected by like a high-end NetScreen or Palo Alto firewall is 10-15 years out of date. We have, like, Tailscale, and netfilter.