my external URL is not reachable, how

[sleek marlin]

You need NAT reflection/loopback NAT on your router - which may or may not support that

The other solution is to use a reverse proxy (eg NPM) to handle SSL and remote access, then you can connect locally without SSL

(this assumes the external URL works from outside the house)

[junior grove]

external URL works from outside lan

[sleek marlin]

Then check your router for NAT reflection/loopback NAT settings

[junior grove]

I dont know if there's that option on my router

the only thing I've check is Traversal NAT

[sleek marlin]

The other solution is to use a reverse proxy (eg NPM) to handle SSL and remote access, then you can connect locally without SSL

[junior grove]

is that documented in HA docs?

[sleek marlin]

Not really, no, but there's an #add-ons-archived to help with it

[vague edge]

You can find the community forum here