I have a solution for people to have Open NAT.

Ports are set up at the router level, either automatically through UPnP, or manually configured by yourself in the router’s web configuration pages.

To manually configure your ports, you will need to go to your router’s login page (e.g. “http://192.168.1.1”), login with the user/pass you have already set up (or the default credentials, which you can find by googling your router’s model number), and go
to the settings page for port forwarding. To ensure that the port forwardings always go to your Xbox, you will need to get your Xbox’s MAC address and set up a “static IP” so your router’s DHCP server will assign the same IP whenever your Xbox connects to
your network. The exact details of how to log in to your router varies with each brand and model, so you’ll have to google search for steps.

Having IPv6 depends on whether your ISP supports it, and if you have a modem/router/gateway that supports IPv6 as well. Since your ISP apparently won’t be supporting it for another year, you’ll have to stick to the steps above.

Xbox Support has an official article detailing what ports are needed for Xbox Live: https://support.xbox.com/en-US/xbox-one/networking/network-ports-used-xbox-live

There is also a solution/troubleshooting guide for getting your NAT to Open: https://support.xbox.com/en-US/xbox-one/networking/nat-error-solution

Ok but that's not right. On screen message Double NAT detected. With 3074 this messages isn't on screen.

I have 3074 in port forward in my router but that is not work. As I write port 3074 need to be in port select screen in xbox.

...My internet provider can not give me a public IP address. Because he does not have the opportunity now. And he told me that I had to wait for it to go to IPv6, but it would be another year. ....

In that case, you need to change your internet provider. If you threaten to leave their service, they WILL find a way to get you a public IPv4 address. Internet Providers that ran out of IPv4 adresses often "hide" multiple of their customers behind one single
IPv4 address in a similar way that your router "hides" all your devices behind your one internet connection. This is called "Carrier Grade NAT", and usually is combined with an IPv4 tunnel through IPv6, called DS-Lite.

So I guess the service person of your ISP doesn't know what they're talking about.

As for the Xbox port thing:

Usually, the Xbox uses the 3074 port, unless it finds a second console in your network (e.g. a Xbox 360, which also uses 3074 to listen to inbound Xbox Live packets).

So a few months ago, they added a setting where you can choose a different port to listen for incoming Xbox Live traffic. You can there choose which port number your console should use from a selection of a few port numbers.

However, no matter what port setting you choose (and then configure your port forwarding rules in your own router accordingly), as long as your ISP does hide you behind a single public IP through CG-NAT, you will never get a proper open NAT.

Most ISPs can give you a public IPv4 address, if you specifically ask for it. Some do it for free, others want a monthly fee.

If your ISP is really unwilling (and it's really a case of "not wanting to", and not "technically unable to") to give you a public IPv4 address, find a different ISP.

Ports are set up at the router level, either automatically through UPnP, or manually configured by yourself in the router’s web configuration pages.

To manually configure your ports, you will need to go to your router’s login page (e.g. “http://192.168.1.1”), login with the user/pass you have already set up (or the default credentials, which you can find by googling your router’s model number), and go
to the settings page for port forwarding. To ensure that the port forwardings always go to your Xbox, you will need to get your Xbox’s MAC address and set up a “static IP” so your router’s DHCP server will assign the same IP whenever your Xbox connects to
your network. The exact details of how to log in to your router varies with each brand and model, so you’ll have to google search for steps.

Having IPv6 depends on whether your ISP supports it, and if you have a modem/router/gateway that supports IPv6 as well. Since your ISP apparently won’t be supporting it for another year, you’ll have to stick to the steps above.

Xbox Support has an official article detailing what ports are needed for Xbox Live: https://support.xbox.com/en-US/xbox-one/networking/network-ports-used-xbox-live

There is also a solution/troubleshooting guide for getting your NAT to Open: https://support.xbox.com/en-US/xbox-one/networking/nat-error-solution

If you NAT type is Open that is exactly where it needs to be for the best gaming experience.

With an OPEN NAT type, you’re able to chat with other people, as well as join and host multiplayer games with people who have any NAT type on their network.

support.xbox.com/.../nat-error-solution

Hope this helps. Good Luck!!

For everybody having issues - what is your NAT set to? Moderate NAT will not work for some people and they won't be able to hear you. Once your NAT is OPEN however you won't have any issues. I had the same one until I fixed it. So you may want to try to
open NAT up and see what kind of results you get.

Here's a guide to try and get that open for you:
support.xbox.com/.../nat-error-solution