Ipv6 forward does not work

[deguito18090 0]

I have a computer connected to AirVPN using openvpn. I forwarded a port into the "Client Area configurations" and if I check the port by click on "Test open" I receive "Open!" for both ipv4 and ipv6 protocols: my computer is listening the open port correctly on both IP protocol.

If I use another computer connected to internet out of AirVPN and I check the open port using ipv4 protocol:

nmap <ipv4_of_AirVPN_device> -sV -Pn -p <port_to_check> -4

I receive "open" but if check using ipv6 protocol:

nmap <ipv6_of_AirVPN_device> -sV -Pn -p <port_to_check> -6

I receive "filtered".

I also can't use the service listening on that port unless I force the use of the ipv4 protocol.

What could be the problem? Why is my ip not correctly forwarded despite the AirVPN check being successful?

 

[OpenSourcerer 1441]

5 hours ago, deguito18090 said:

What could be the problem? Why is my ip not correctly forwarded despite the AirVPN check being successful?

Your configuration is sound. The port forwarding on AirVPN, though, does not support IPv6 yet (it's rather port sharing with v6, but anyway… you know what I mean).

[Staff 10014]

@OpenSourcerer
@deguito18090

Hello!

We're glad to inform that inbound packet forwarding is implemented for IPv6 too. Please feel free to open a ticket for additional investigation.

Out of curiosity, IPv6 DNAT and Masquerading are supported even in Linux starting from netfilter6 in kernel 3.9.x or 4 if we remember correctly.

Kind regards

 

[OpenSourcerer 1441]

I see, thank you for the update. But when did that happen exactly?

[Staff 10014]

17 hours ago, OpenSourcerer said:

I see, thank you for the update. But when did that happen exactly?

Hello!

Soon after IPv6 implementation years ago, but it was not advertised and we also wrote a message claiming it was not supported. That message was wrong.

Kind regards
 

[OpenSourcerer 1441]

7 hours ago, Staff said:

we also wrote a message claiming it was not supported. That message was wrong.

Exactly. But good to know.