Another wrinkle: RFC 1035 states "The labels must follow the rules for ARPANET host names. They must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen. There are also some restrictions on the length. Labels must be 63 characters or less."
RFC 1123 states " The syntax of a legal Internet host name was specified in RFC-952 [DNS:4]. One aspect of host name syntax is hereby changed: the restriction on the first character is relaxed to allow either a letter or a digit. Host software MUST support this more liberal syntax. Host software MUST handle host names of up to 63 characters and SHOULD handle host names of up to 255 characters." It does not mention RFC 1035 label requirements also being updated, though obviously using digits as first characters is now quite common. It also implies that RFC952 is indeed the reference document to work from. Mighty confusing! Mike -----Original Message----- From: Matthew Pounsett [mailto:m...@conundrum.com] Sent: Wednesday, February 25, 2009 2:34 PM To: Evan Hunt Cc: Mike Bernhardt; bind-users@lists.isc.org Subject: Re: single-character host names >The OP should be looking to RFC1035 section 2.3.1 for the >specification for modern host names. _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users