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>For one thing, they often make it against the ToS to host 'a server' (generally).

Beyond this, it can also be impossible due to lack of a static IP or control over the router (5G internet service with CGNAT). A VPS with WireGuard and remote port forwarding allows access for things like SSH.

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Many DNS providers allow you to curl a particular URL to set the IP address for your domain. Set your server to curl it periodically, and it solves the lack of a static IP.

No good if your isp provided IP is behind an ISP nat. Eg via 3/4/5g Dongle. VPS can get you past that in a few ways.

Alternatively, CloudFlare Tunnel can do this for free without the need for a VPS (assuming you're serving HTTP traffic only.)

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