ANSWERED Tunnelblick IPv6 warnings

[kaloz 0]

One or more possible problems with DNS were found: 

     • DNS server address fde6:7a:7d20:526::1 is not being used but was expected to be used for VPN 'Angetenar'.

What does it mean, lately getting it no matter which of  the servers I want to use

[OpenSourcerer 1474]

Is this on Eddie?

[kaloz 0]

It is on Tunnelblick

 

[Staff 10144]

On 5/5/2025 at 10:48 PM, kaloz said:

It is on Tunnelblick

Hello!

According to reports found on the web, Tunnelblick warns that IPv6 DNS server is not being used when the "disable ipv6" checkbox is ticked. The warning can be incorrect because it is thrown even though the IPv6 tunnel is functioning correctly and DNS queries to the provided IPv6 DNS server address work fine, can you verify? If DNS6 does not work, the problem can be related to the peculiar macOS management of IPv6 tunneling over IPv4, please see here:
https://gist.github.com/smammy/3247b5114d717d12b68c201000ab163d

Both Eddie and Hummingbird for macOS were rewritten in 2022/2023 to properly "convince" macOS to do IPv6 DNS lookups when your only IPv6 address is via a VPN or tunnel of some sort. We're not sure about Tunnelblick, when we tested in 2022 it could not do it.

Kind regards