Public bug reported:
When IPv6 is only available using "miredo" (I don't know about the case
of native IPv6) "systemd-resolve" seems not to query for AAAA entries
when AF_UNSPEC or simply a NULL pointer is passed to getaddrinfo().
This has the effect that tools that support both IPv4 and IPv6 and use
AF_UNSPEC or NULL will simply fail to connect IPv6-only servers when the
name has to be resolved via DNS.
(The problem was occurring with the Firefox web browser.)
(The AAAA record is however queried if AF_INET6 is explicitly passed to
that function.)
A possible quick fix is to modify the /etc/nsswitch.conf:
Before: "hosts: ... resolve [!UNAVAIL=return] dns"
After: "hosts: ... resolve dns"
Or even remove "resolve" completely: "hosts: ... dns"
However it would be better to create the possibility to configure how
the system should behave in the case of AF_UNSPEC:
- Only ask for the A record
- Only ask for the AAAA record
- Ask for both, prefer A
- Ask for both, prefer AAAA
** Affects: resolvconf (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1728445
Title:
DNS not working for IPv6-only host names when using Miredo
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