dyndns problem

[djpope15]

good afternoon
I have a problem with dyndns

I have registered a host on dyndns and I have opened port 5060 (sip) on my router redirected to my server based on debian but I can't get it to redirect when I enter nombredemihost.dyndns-server.com in my browser for example

I have also tried adding my dyndns account in the ddns section of the router
and adding the DMZ that is directed to the ip of my server.

I also try to put nombredemihost.dyndns-server.com:5060 and nothing
I do a tracerouter and it doesn't advance to the ip of the server

Can anyone help me?

[djpope15]

It already works, a question:
How can I make sure that in case of a fall or change of public IP, the dyndns does not fall?
It will be for offering a company service.
How much can a private public IP cost?

[cobito]

The router is supposed to automatically update the new IP with dyndns. As for the private public IP I assume you mean a static address. Depending on the company it costs between 2 and 12€/month. With ya.com (now Orange) it came as standard. I don't know if Orange will do the same but when I had it I remember having to pay 2 or 3€ per month for the static IP.