Domains aliased to a pool of IP addresses doesn't get resolved

[Florian Weimer]

* Yuri Kanivetsky:

>> What's listening there? Is it something provided by vagrant?
>
> I don't see anything listening on that port neither in VM:

> Nor on the host machine:

Then maybe something uses iptables (or similar) to pass through the
DNS traffic to the external recursive resolver, and it fails to do
this for both UDP and TCP traffic.

I don't know if this is a generic Vagrant issue.