IPv6 and price API

[chinesechef]

Describe the bug
When enabling IPv6 I get the error "Price service: Connection error".
It appears that there are no IPv4 DNS when enabling IPv6. The DNS field is just empty but the DNSv6 is showing the DNS servers.

To Reproduce
Steps to reproduce the behavior:

1. Go to settings
2. Enable IPv6
3. Save
4. Reboot
5. See the IP information on the status page. There should be IPv4 and IPv6 but no DNSv4 IPs.

Expected behavior
Should still be able to retrieve prices.

Hardware information:

• Country: Denmark
• Meter: Kamstrup
• Encryption enabled yes
• AMS reader: POW-K+
• M-bus adapter (if applicable):

Relevant firmware information:

• Version: 2.5.5
• MQTT: yes
• MQTT payload type: home assistant
• HAN baud and parity: 2400 8E1
• ENTSO-E API enabled: yes

[ArnieO]

Interesting!
We might ask for your help to debug this further, I suspect @gskjold might not have IPv6.

[chinesechef]

Sure. Let me know how I can help.

[gskjold]

I have IPv6, so should be fine to debug if necessary, but first, lets get a screenshot of the Network tile on your status page

[chinesechef]

Only IPv4

With IPv6

Also IPv6 is not possible to set static?

[gskjold]

Thanks, I'll look into it.
Correct, no static config for v6