Hacker News Reader

> except 51820

Even then, it's technically open but it's using UDP so it's not like it'll show up in port scans or anything.

UDP port scans are a thing:

Wireguard protocol is specifically designed not to show up on port scans. See section 5.1 of the white paper: https://www.wireguard.com/papers/wireguard.pdf

Very cool - I didn't know that!

But, speaking generally, it's still good to know that UDP port scans are very much possible.