I have a LXD VPS running in the cloud with a lxdbr0 interface to host the containers (both ipv4 and ipv6). This lxdbr0 bridge is bridged with a local running LXD host, but the local host has no ipv6 address assigned in the network configuration. I.e :
lxc network show vps-net config: ipv4.address: none ipv6.address: none tunnel.as1.local: 192.168.10.1 tunnel.as1.protocol: gre tunnel.as1.remote: 10.23.96.6 description: "" name: vps-net type: bridge
I can’t ping from the local LXD host to the ipv4 address space on the vps-net bridge (expected behavior), but I can ping6 to the ipv6 subnet on that interface (not expected)? Because of this my local LXD host has ipv6 access to the internet as well, since its default for ipv6 is set to the remote LXD host.
NB: the tunnel between the LXD hosts runs via an openvpn VPN.
NB2: I know ipv6 auto configures an interface, but should it not switch off ipv6 when you set ipv6.address to none?