ISPConfig 3.1.11, Debian Stretch 9.4 I tested by creating domain hääyöaie.fi. Creating works and domain shows in DNS-Zones list, but searching with those öä characters does not work. Nothing is found. Like so: - searching for hää, nothing found - searching for aie finds the domain
sounds punny to me have you entered it as is or converted the name to punycode before entering? edit: I replied too fast, ispconfig should handle it https://git.ispconfig.org/ispconfig/ispconfig3/issues/2487 if php-idn is set up
ISPconfig converts it, but it might be that the conversion filter is missing in the dns list definition. Please make a bug report for it and we will check and fix it.