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My situation is the following, I have a website hosted on a linux machine(with apache2), unfortunately my router (unitymedia) provides only a port filtering for the IPv6 adresses, but no port forwarding for IPv4. Then I have created a noip account, I have created a domain name and installed a duc on my machine. Noip has given a kind of virtual IPv4 number to my machine so I thought it would work, unfortunately the connections from IPv6 works but the IPv4 connections that are not local return a timeout error. (IPv4 connections on the local network work).
I think there are two possibilities, the box is cutting the IPv4 connection or the website is replying with IPv6 on the virtual IPv4 connection (is that possible ?).
Is there a way to get around this trouble ? (I cannot change the box/router).
edit:
if I try to use socat I obtain the following error :
sudo socat TCP4-LISTEN:22,fork,su=nobody TCP6:[2a02:xxxx:xxx:xxxx:xxxx:xxxx:xxxx:xxx]:22
socat[10594] E bind(5, {AF=2 0.0.0.0:22}, 16): Address already in use
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If you’re a Unitymedia customer in Germany, you most likely have DS Lite. That means native IPv6 connectivity but carrier-grade NAT with IPv4. You simply cannot receive unsolicited IPv4 traffic.
– Daniel B – 2018-02-18T22:23:20.050You cannot connect to your home network from outside with IPv4. This will never again work. The only solution is to begin using IPv6. – Michael Hampton – 2018-02-18T23:16:30.897
Thank you for informing me !
Well, I would like to access the website (a Nextcloud platform) from the university (but I think the IT department deactivated the ipv6 on the full network, or the firewall is blocking it). Is the Ipv6 tunneling an option ? An other way would be to access it from my mobile phone (from the 4g network), but here again I am stuck. My phone does not access the website and it could be a constructor or an operator fault since constructors and operators are not activating it systematically. Is there a way to make it work ? (I did not found so much info in other topics) – Trebok – 2018-02-19T20:54:11.057