Comment by mschuster91

> This is what routers are for.

Useless in modern days though. IP addresses with anything backed by any cloud/CDN can vanish whenever they want, you'll always need to keep track of the upstream DNS responses.

That's extra fun if you do site-to-site-VPNs with a major customer. Won't name names, but they do have a habit of going through IP renumbering sprees every year or two and it's a true pain to keep the routing table, Zerotrust provider config and firewall rulesets in sync.