[Freeipa-devel] [PATCH] 871 add hostname regex

[Rob Crittenden]

Alexander Bokovoy wrote:
> On Tue, 13 Sep 2011, Jan Cholasta wrote:
>>>> What about IDN hosts? With this change we would require them to be
>>>> always in Punycode?
>>>>
>>>
>>> Oh, hadn't considered that, I was just following the relevent RFCs. Is
>>> there a way we can easily support those as well?
>>
>> The easiest way would probably be:
>>
>>      normalizer=lambda value: unicode(value.encode('idna'))
> That's one part. Another one is visualizing such content -- for both
> Web UI and CLI we would need to run encodings.idna.ToUnicode().
> Finally, make sure whatever we pass to external applications is
> properly formatted as well -- all of them should be able to work with
> xn-<Punycode>  form.

The UI also links the DNS hostname to the host entries so I'd think the 
names must be matchable in some way. If DNS can only store punycode 
names I think the regex will be fine.

rob