Failed to work out externally visible IPv6 address

[rlattuad]

SYSTEM INFORMATION
OS type and version	Ubuntu Linux 22.04.5
Webmin version	2.610
Usermin version	2.510
Virtualmin version	7.50.0 GPL
Theme version	26.20
Apache version	2.4.52
Package updates	All installed packages are up to date

While doing a System Settings/Checking Configuration/ I get the following:
Failed to work out externally visible IPv6 address

I may be wrong but it did not seem to be there before the latest Webmin update, in any case is this something to worry about ? How can I fix it ?

Thanks
Roberto

[Joe]

It means you have IPv6 configured on your system, but when Virtualmin tries to work out the public IP, it isn’t able to check for IPv6 (it does this by checking with our validation server, by making a request to the IPv6 address, which then returns what IP it sees in the request).

This could happen if you have a firewall that prevents that IPv6 traffic. Or, it could happen if you don’t actually have routable IPv6.

If you aren’t using IPv6 for Virtualmin hosted sites, it doesn’t matter. If you are, it obviously does matter…but if you configure the address correctly manually, it goes back to not mattering.

Edit: And, it is somewhat new. We didn’t used to have separate tests for IPv4 and IPv6.

[Ilia]

There’s a bug causing this in Virtualmin 7.50.0. We will fix it in the next version.

Meanwhile, you can already fix it by applying this patch:

webmin patch https://github.com/virtualmin/virtualmin-gpl/commit/8655d67

[Ilia]

@Joe

Or, it could happen if you don’t actually have routable IPv6.

Yes, that’s the case.