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    Can someone translate message


    Hi, I was unable to do port forwarding from a ZXHN H298N router. I had created a static address on my wireless network card. Also created a path on 'Application-NatLoop and Port Forwarding' on the router. I had reduced security on firewalls to minimum on both router and computer. I was using opensuse Leap 42.2. I was trying to open port 80 on my machine.
    When I used 'canyouseeme.org' to verify if port 80 was open I got message: Error I could not see your service on 88.**.***.*** **on port (80). One reason why I was not getting port forwarding may be because I was behind more than one router. My external IP address was different from the IP address of the router. I read that if that was the case the internet facing router was with the ISP.
    I wrote to my ISP and the following was their reply.

    Since your site (building) has been migrated to CGN (Carrier-grade NAT), all the routers on that site (including the one located in your property) have CGN IP addresses. CGN implies that one public IP address is translated into several CGN IP addresses that we are providing to our residential customers.
    The CGN migration is something that all providers in UK (and all over the world) started to implement for residential customers due to lack of IPv4 addresses.
    The Static IP is available as an add-on and it is charged 5 per month. It can be added or removed from your account anytime and it is a temporary solution until we fully migrate to IPv6.
    The IPv6 migration is happening as we speak and all sites should be migrated within the next 2 months. Should you wish to add the Static IP to your account, please confirm by replying to this e-mail.
    Could someone explain what is being said in the message (I don't have a clue) or what I should do to resolve my problem. All help will be greatly appreciated.
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    so, did you go thru the steps > HERE < to do your port-forwarding?
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    Basically that message is saying that your router doesn't have a public IP address, instead you have an internal private IP instead as part of your ISP's larger network. They then provide NAT from their network to actual public IPs. In this type of setup you typically cannot run your own services as there is no way to port forward through the ISP's routers.

    The solution is to obtain a public IP address rather than be part of your ISP's private network. From their response I'd guess this requires purchasing a static IP from them for an additional 5 per month.
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    Hi, Many thanks for your replies. One thing that I don't understand is after IPv6 migration will the situation remain the same, that is, will I still be part of my ISP's private network or will my router have a public IP address? If latter then I might as well just wait for the changeover.
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    You should have a public IP once IPv6 is rolled out. The reason you're on a private ISP network right now is likely because they simply do not have enough IPv4 addresses available to them for every customer to have one. That exact problem is what IPv6 is designed to solve, it provides enough address space for everyone to have thousands of personal public IP addresses.

    Many places are getting IPv6 up these days, but there are still many places that have not yet enabled it. Even if you have it enabled, only other users who also have it enabled would be able to connect to your server via IPv6. If you need everyone to be able to connect to your server, you'll still need to purchase an IPv4 address for those who have not yet made the switch.
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