Hello
I access my site installed on my computer via an OVH domain name.
To cope with the IP change of my Livebox, I added a DynHost and clicked on "manage access" and defined a tld sub‑domain. I now have an identifier mondomaine.ovh‑tld
First question: should I specify a tld sub‑domain?
Second question: Orange's documentation states that I must specify the hostname, email, and password in my Livebox's DynDNS. I entered mondomaine.ovh, my email, and the password for my OVH account. Do you know if these are the correct details needed to manage variable IPs?
Good evening
In step 2 – Create the dynamic DNS record (DynHost), I put a * in the subdomain name.
In step 3 – Automate the DynHost change, the DynHost is .mydomain.ovh
Is it .mydomain.ovh that I should enter into the Livebox?
Having been one of the dyndns.org users since the very beginning, and having made a small donation when it was still in collaborative mode, I got lifetime VIP status.
So I don’t use OVH.
Show a bit of the dialogue from your Livebox. We don’t have the same ones in Belgium.

DynDNS is one of the providers (and the first, historically speaking) that offers this service.
OVH is another. If the Livebox does not allow you to choose anything other than DynDNS, then it’s dead, because the Livebox will contact the wrong servers to perform an update.
If the Livebox recognizes nothing other than DynDNS, see the Orange user forums, as you are certainly not the only Orange customer using OVH.
Also, a hostname does not start with a dot. It is either 'informer38.ovh' or 'serveur.informer38.ovh'.
OVH has just migrated its guides to a new interface, the link is https://docs.ovhcloud.com/fr/guides/web-cloud/domains/dns-dynhost
Don’t forget to check all the tabs.
I misunderstood the question. Here are the proposals offered to me by Orange. There is OVH‑dynhost

In the sub‑domain, I can set nextcloud to have the dynhost address nextcloud.informer38.ovh
Strangely, after deleting the dynhost, the A DNS record remains even though I asked for its removal.
Is your problem resolved then?
No, because if my DynHost is nextcloud.informer38.ovh, that’s also the domain name assigned by OVH in ZoneDNS and it doesn’t work for me since my site is accessed via informer38.ovh.
In step 2 – Create the dynamic DNS record (DynHost), I therefore put a * back in the sub‑domain name and wrote this in my Livebox (without the dot). Is that correct?


Read through the OVH guide again. There's probably no point in entering your Orange email (and what password, anyway? The one for your email account?)
I keep reading and rereading, but I don’t see any problem with what I did.
In any case, your site works, and if I visit another address (for example amontpellier-554-1-97-32.w92-145.abo.wanadoo.fr ) Apache does return the default Ubuntu site.
Hello
My site is working fine indeed.
Do you think my dynhost will change the IP in a timely manner?
Regards
Alas, I am unable to answer.