Cannot use ipv6 with tunnelbroker from Hurricane Electric

[Thirsting6053]

Hello,
I am currently experiencing a problem when using the Hurricane tunnel broker with Proxmox.

My container can't ping the ipv6.

Some tests I have done:
- The container ip is pingable from the host machine.
- google.com is pingable from the host machine.

My configuration:

# network interface settings; autogenerated

# Please do NOT modify this file directly, unless you know what

# you're doing.

#

# If you want to manage parts of the network configuration manually,

# please utilize the 'source' or 'source-directory' directives to do

# so.

# PVE will preserve these directives, but will NOT read its network

# configuration from sourced files, so do not attempt to move any of

# the PVE managed interfaces into external files!


source /etc/network/interfaces.d/*


auto lo

iface lo inet loopback


auto enp0s20f0

iface enp0s20f0 inet dhcp


iface enp0s20f1 inet manual


auto eth4

iface eth4 inet6 tunnel

        mode sit

        endpoint 216.66.84.46

        local 163.172.60.27

        ttl 255


auto vmbr0

iface vmbr0 inet6 static

        address 2001:470:1f15:731::/64

        gateway 2001:470:1f14:730::1

        bridge-ports eth4

        bridge-stp off

        bridge-fd 0

My container configuration :



My tunnel configuration from Hurricane :



Where did I go wrong?

Sincerely,
Thirsting6053