As already noted on this thread, you can't use certbot today to get an IP address certificate. You can use lego [1], but figuring out the exact command line took me some effort yesterday. Here's what worked for me:

    lego --domains 206.189.27.68 --accept-tos --http --disable-cn run --profile shortlived

[1] https://go-acme.github.io/lego/

▲ 12 hours ago | parent | next [-]

[deleted]

▲ Svoka 13 hours ago | parent | prev [-]

I wonder if the support made it to Caddy yet

(seems to be WIP https://github.com/caddyserver/caddy/issues/7399)

	▲	mholt 12 hours ago \| parent \| next [-]
		It works, but as another comment mentioned there may be quirks with IP certs, specifically IPv6, that I hope will be fixed by v2.11.
	▲	jsheard 13 hours ago \| parent \| prev [-]
		IPv4 certs are already working fine for me in Caddy, but I think there's some kinks to work out with IPv6.