OpenWrt how to get hostname.mydomainname.tld

[Pixel]

Hello !
first, sorry for my english, i'm french
I have a pfsense+ firewall which works great.
I bought a domain name like mydomainname.com
Every device on my local network has an address like hostname.mydomainname.com and I can connect to it with this address.
I would like to do the same thing with openwrt I use like a dumb AP on a Netgear wax206.
How can I get this with openwrt ? like openwrt.mydomainname.com
How can import the certificate for mydomainname.com into openwrt, because I have a ssl certificate in pfsense links to mydomainname, using acme let's encrypt.
On my other devices which I connect with hostname.mydomainname.com address, I use the same certificate, so there is no certificate alert.

At last, is there an easy way to manage wifi mac filters to easily add blocked wifi devices without disabling mac filter ?

thanks

[appelsin]

Howdy and welcome to le forum

Think these are a good bet maybe?:

# uci show uhttpd
uhttpd.main.cert='/etc/uhttpd.crt'
uhttpd.main.key='/etc/uhttpd.key'

Login to the router CLI using SSH.

Edit these two files, put new certificate and key in.

[mk24]

Acme can run on OpenWrt.

Making luci / uhttpd visible directly on the Internet is not recommended as they are not security hardened. (https is for protection of users; it does nothing to stop the server from being hacked) For local use you can register the openwrt.mydomain.tld in your local DNS and also have the router acme letsencrypt certificate.

[appelsin]

@mk24

Making luci / uhttpd visible directly on the Internet is not recommended

You don't have to make it visible on the Internet just to use a valid certificate, though.

Browser will happily access https://hostname.mydomainname.com/ and validate the certificate, even if DNS points to something like 192.168.1.1 and you're sitting on the LAN.

[Pixel]

It works great !
Thanks