Dynamic DNS solves a similar but different problem. As the name says, it focuses on DNS. It doesn’t solve the “I get a static IP” and instead accepts the IP won

Dynamic DNS solves a similar but different problem. As the name says, it focuses on DNS. It doesn’t solve the “I get a static IP” and instead accepts the IP won’t be static and focused on identifying and updating the IP as needed. Basically it sets a DNS record for your routers WAN IP. You would need to punch holes and do port mapping and all that jazz. Hoppy appears to solve this problem by providing a static endpoint to route traffic over. Tailscale eschews the public internet altogether, while providing Tailscale-network static IPs. Tailscale is the most strict/limited as you mentioned (not all devices can address into it) but the most secure (since each device has to be included and there’s no public internet). Hoppy seems next on secure/convenient list where anything should work but you have to use public internet.