still doesn´t allow umlauts in the hostname??? What year ist it, 1988?

and -Linux don't support umlauts in hostnames either. Is this a bug in Linux, where somebody forgot to use UTF8 in the API?

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AFAIK hostnames are following DNS rules, which only allow ascii

@kirschwipfel well since 2003 there are IDN Domains which use punycode to encode special alphabets into ASCII. But you are somewhat correct: This encoding is kinda cludgy and probably should be avoided.

Punycode has been invented exactly to cludge ;-) around the limitation of DNS only allowing ASCII characters.
But your point is correct: why not use punnycode in the hostname and the api should convert this into Utf-8. I assume it has been missed to define such an api.

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