TrueNAS 26 Beta 1 docker host network

Apps and Virtualization
1

Does the docker host network, under TrueNAS 26 Beta 1, support IPv6? I think I’ve configured everything right and there are some posts from 2024 (not specifically relevant) that makes me think it wasn’t supported at that time.

Assistance would be nice, but right now I’m just confirming it should work before investing more effort.

For me,

docker inspect host

“EnableIPv4”: true,
“EnableIPv6”: false,

TrueNAS is using br0 bridge for networking and IPv6 is configured correctly (I think), addresses assigned, etc.

oot@truenas:/sys/class/net/tailscale0# sysctl -a | grep net.ipv6.conf.all.forwarding
net.ipv6.conf.all.forwarding = 1

2

Doesn’t look like it. Bridged networks support IPv6. Host networks only support IPv4.

3

Thanks for the response.

Do you have a pointer to documentation explicitly stating that or are you basing it on your own experience?

4

I’m basing it on the output of docker network inspect host vs docker network inspect bridge. Also API call midclt call docker.network.query | jq only shows the bridged networks instantiated into apps with IPv6 settings but doesn’t output anything for the host network.

5

Thanks for the additional info.