Hetzner IPv6 - Can't set default gateway

TrueNAS General
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1

Heho
I’m pretty new to TrueNAS and have it now installed on a server by Hetzner.

My problem is now that I can’t get a IPv6 connection to work.

It’s quite the same to this old thread. I can’t set a default ipv6 gateway because its invalid. In fact it’s saved because I can see it under the console menu.

But somehow there is no connection.

Now If I do the same as in the thread and enter “ip -6 route add default via fe80::1 dev enp15” then I can use ipv6 normally.

Is there any good option to make this permanently?

Greetings
Cy

PS: I didn’t add any errors here, because they are exactly the same as in the old thread

2

You could add the cmd line as a post-init command in advanced settings

3

ahh, good idea. I’ll try that tomorrow, but only after a reboot.
While I was experimenting with the console, I saw that the network tab showed a network configuration change after I ran the command and the test button was there. So I tested it and the IPv6 gateway showed up in the GUI afterward. Maybe that saved it permanently, but I can’t test that right now since I can’t restart the server at the moment.

4

A lot of gui functionality is built to show the underlying state.

So if you change the underlying state, even in a way that the gui won’t allow, sometimes it will still render.

Where you run into issues is then attempting to modify that state again via the gui

1 Like
5

Update: Nope was not saved. So i think post-init it is :smiley:

1 Like
6

I also got my hopes up when I saw the default gateway appear in the appliance interface. At least it doesn’t appear to break anything.

If someone wanted to contribute a fix would that be welcome?

7

This has been an issue with IPv6 in TrueNAS for some time, possibly forever. I ran into it with Core some time back. There are a couple of threads and also bug reports on it but those haven’t been prioritised. I raised a related one myself related to autoconfig. Then noticed that several tickets have been closed then bundled under a “catch-all fix IPv6 ticket”: NAS-120562. Implies to me that iX are aware that IPv6 in TrueNAS requires a complete overhaul. Unfortunately that ticket also hasn’t been prioritised or scheduled towards a future release yet.

8

Thank you for the link. I suppose I’ll just keep my post-init network setup scripts around for the foreseeable future.