VPN connection over ipv6 not working

[pc14]

Hi,

I am connecting to my asus RT AX86S over ipv6 via an openvpn connection from my ax55. I get the routers to connect but no internet connectivity on the client side after the vpn connection is established.


Every now and then it gives below IP conflict error; though after disconnect / connect that error disappears and I get a blue checkmark.
I changed the LAN ipv4 addres ranges of both routers to not match (one is 192.168.50.* and the other one 192.168.75.*)

Setup:

RT-AX55 in the Netherlands as openvpn client behind cable ISP modem in bridge mode. RT-AX55 has public wan ipv6 address
RT-AX86s in Switzerland as openvpn server behind optic fibre ISP modem . ipv4 is cgnat (no own public address); own ipv6 public address. Modem has firewall turned off.



RT-AX86s server set up:

RT-AX55 client set up

The open vpn config file was generated by the RT AX86s ; I amended the IPV4 adress to the IPV6 address and changed proto to UPD6

# Config generated by Asuswrt-Merlin 388.1, requires OpenVPN 2.4.0 or newer.

client
dev tun
proto udp6
remote [2a04:*************:c9ff:feea:b5e8] 1194
resolv-retry infinite
nobind
float
ncp-ciphers AES-256-GCM:AES-128-GCM:AES-256-CBC:AES-128-CBC
keepalive 15 60
auth-user-pass
remote-cert-tls server

 

[RMerlin]

OpenVPN client does not support IPv6 in Asuswrt-Merlin.

 

[pc14]

Thank you for your fast reply. What clients would then be able to connect to it ? (Or would any alternate set up work with these two routers, knowing the server side only has a public ipv6).

 

[RMerlin]

Thank you for your fast reply. What clients would then be able to connect to it ?

You'd have to setup the client on a PC/VM within your network.