A valid hostname may contain only the numbers 0-9, upper and lowercase letters (A-Z and a-z), and the minus sign. It must be at most ${maxhostnamelen} characters long, and may not begin or end with a minus sign.
Isem n usenneftaɣ ameɣtu yezmer ad yesɛu imḍanen kan seg 0-9, isekkilen imeqqranen d yimecṭăḥ (A-Z d a-z), akked uzamul n drus. Ilaq ad yesɛu ma aṭas ${maxhostnamelen} n yisekkilen yerna ur ilaq ara ad yebdu neq ad yekfu s uzamul n drus.