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Created 02 Nov 2003
Modified 07 Apr 2012

Article 183


Internationalized Domain Names (IDN)

SmartFTP uses IDNA (Internationalizing Domain Names in Applications) to support domains with unicode characters. IDNA is a mechanism to represent non-ASCII domains with only ASCII characters. This "feature" is transparently implemented in SmartFTP and domain names with unicode characters are automatically converted to the IDN format.



  1. IDN Convertor Test
  2. RFC: Sring Preparation (stringprep)
  3. RFC: IDNs in Applications (IDNA)
  4. RFC: Name Preparation (nameprep)
  5. RFC: Encoding Scheme (punycode)
  6. VeriSign IDN Software Development Kit
  7. GNU IDN Library

idna, idn, internationalized domain name