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.

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.

What a bunch of technobabble! If it were me, I'd call my ISP and ask them to translate.

In the meantime, a websearch for "CGN Migration computer" turned up this: https://en.wikibooks.org/wiki/Comput...ration_to_IPv6

https://en.wikipedia.org/wiki/Carrier-grade_NAT

Note under "Disadvantages":

• It makes it impossible to host services.

Translation: You're behind yet another NAT router now, and it is one you do not control. You'll have to pay the fee for a static IP address if you want to host a service, or else set up a tunnel to someone who actually has a routable public IP address and is willing to forward your traffic.

i think this is clear enough.

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.

IP6 does not use NAT anymore. Your computer will have its own public IPv6 address and can be reached without port forwarding. The number of IPv6 addresses is sufficient for the forseeable future.

In order to protect you from attacks your modem does provide a block for all traffic coming from the outside. Just as for port forwarding you have to allow for incoming connections. But that is filtering, and not NAT-ting.

So you could wait until IPv6 is deployed, BUT you can be reached from the outside only by the IPv6 protocol. Because you have a public IPv6 address, but not a IP4 address anymore.

jlinkels

There will be enough IPv6 addresses to give your underwear a static address as well as to the bottle of your dish detergent... ( wait. She said what, when she left the house?)

And we will rejoice and dance in the streets (dense as we are).