===== What? =====
This is an encoding of non-ascii-characters into ascii, i.e. accessing [[https://日本語.fluxcoil.net/]] in the browser gets possible. The application (like browser) translates 日本語 and then accesses [[https://xn--wgv71a119e.fluxcoil.net]] .

===== data =====
<code>
### install libidn
sudo yum -y install libidn

### convert 日本語
$ idn 日本語
xn--wgv71a119e

### entry in binds zonefile:
xn--wgv71a119e  CNAME   ns1

### verification if resolving works
$ dig +short 日本語.fluxcoil.net
ns1.fluxcoil.net.
37.221.196.24
</code>