ipv6 port forwarding like ipv4

[popallo]

Hi all!

Totally new to ipv6, I'm trying to reproduce an ipv4 routing configuration on ipv6.

I have a hetzner server on which the interface is configured as follows:

# loopback device

auto lo

iface lo inet loopback

iface lo inet6 loopback



# external ipv4

auto eno1

iface eno1 inet static

        address xx.xx.xx.xx

        netmask 255.255.255.255

        gateway xx.xx.xx.1

        pointopoint xx.xx.xx.1



# external ipv6

iface eno1 inet6 static

        address xxxx:xxxx:xxxx:xxxx::1

        netmask 128

        gateway fe80::1

        up sysctl -p



# ipv4 network and NAT rules

auto vmbr0

iface vmbr0 inet static

        address 192.168.1.254

        netmask 24

        bridge-ports none

        bridge-stp off

        bridge-fd 0



        post-up echo 1 > /proc/sys/net/ipv4/ip_forward

        post-up iptables -t nat -A POSTROUTING -s '192.168.1.0/24' -o eno1 -j MASQUERADE

        post-down iptables -t nat -D POSTROUTING -s '192.168.1.0/24' -o eno1 -j MASQUERADE



        post-up iptables -t nat -A PREROUTING -i eno1 -p tcp --dport 80 -j DNAT --to 192.168.1.100:80

        post-down iptables -t nat -D PREROUTING -i eno1 -p tcp --dport 80 -j DNAT --to 192.168.1.100:80

This works very well for ipv4 and now I'm looking to do the same configuration, well pretty much, on ipv6. I searched the forum and found a similar example here: https://forum.proxmox.com/threads/setting-ipv6-on-proxmox.51008/#post-237274

Only, after multiple attempts to adapt and restart the server, it does not work.

Could someone please help me?

Thanking you in advance. Please take care of yourself.