SSL Cert and Firewall

[ArminF (Armin Felkel)]

Greetings,

found this maybe it helps:

How to manually set SSL certificates?

My question in short: How can I set the SSL certificates that Home Assistant OS uses? In longer: I am running Home Assistant OS on a Raspberry Pi. My domain setup is a bit complicated: I use DuckDNS in order to get a a subdomain name, let’s say it is example.duckdns.org. My domain provider allows me to edit the nameserver (but sadly I cannot use Let’s Encrypt with the DNS challenge), so I set a CNAME entry to have a subdomain of my own domain point to example.duckdns.org, lets call it: myserv…

Firewall on the HAOS?
Not sure maybe there is iptables or linux firewall on the system and you can enable and start it.
For the webserver you might can specify the allowed network ranges.
https://httpd.apache.org/docs/2.4/howto/access.html

i do run my own CA at home using Download.
Had to install the root CA on my end devices to be able to offer SSL/TLS encrypted sites.

good luck!
armin