Connect from local network by ddns to home server

[ofit]

Good.
How to connect to the home server from the home network using domain name like s1.example.com?

Prior to the opnsense router, I had an Asus ac56u router on which I used ddns and could connect to the home server from the local network through the s1.example.com domain.
I want to configure opnsense so that it works similarly to asus ac56u so that I can connect to the home server on the local network from the local network under a domain like s1.example.com.
Help me please. Thanks.

[Darkopnsense]

Hi,

If you have configured your Asus ac56u router previously what is your problem with doing it the opnsense router?

I don't understand what's blocking you.

Sincerely, (French mother tongue)