More generally, it feels like in 2023 that connecting two computers via a public relay ought to be a solved problem, on the level of, like, DNS. Or maybe it is and I haven't heard?
// DEFAULT_RELAY is the default relay used (can be set using --relay)
var (
DEFAULT_RELAY = "croc.schollz.com"
DEFAULT_RELAY6 = "croc6.schollz.com"
DEFAULT_PORT = "9009"
DEFAULT_PASSPHRASE = "pass123"
INTERNAL_DNS = false
)
In principle IPv6 should've solved this problem a long time ago... without a need for third parties.