single-character host names

SM sm at
Wed Feb 25 22:34:18 UTC 2009

At 13:46 25-02-2009, Mike Bernhardt wrote:
>I've been looking into the RFCs regarding whether or not single-character
>(alpha) host names are allowed or not. RFC 952 says no, but 2181 says that
>host names must between 1 and 63 octets in length, which would appear to say

Section 2.1 of RFC 1123 discusses the syntax for host names and 
clarifies RFC 952.  Host names can be up to 63 octets and the FQDNs 
up to 255 octets (RFC 2181).  You can have a single-character host 
name as long as it follows the syntax.


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