[80947] in North American Network Operators' Group
Re: Underscores in host names
daemon@ATHENA.MIT.EDU (Roger Marquis)
Thu May 19 11:53:21 2005
Date: Thu, 19 May 2005 08:52:56 -0700 (PDT)
From: Roger Marquis <marquis@roble.com>
To: nanog@trapdoor.merit.edu
In-Reply-To: <200505191522.j4JFMIkk014780@turing-police.cc.vt.edu>
Errors-To: owner-nanog@merit.edu
On Thu, 19 May 2005 Valdis.Kletnieks@vt.edu wrote:
> On Thu, 19 May 2005 08:04:31 PDT, Roger Marquis said:
>> Laurent Frigault wrote:
>>> gethostbyaddr (and may be other functions) will return NULL under at
>>> least FreeBSD/NetBSD for ANY PTR having the "_" character.
>>
>> As it should. I wish it would also return a null for hostnames
>> containing sequential non-alphanumerics (--, ---, __, ___, ...).
>
> Don't like RFC3490 and its xn-- hostnames? ;)
Most definitely not, and if this were 1985 I'd be {rf}commenting on
the inadvisability of such hostnames, and those beginning or ending
with "-", TLD names shorter than 2 or longer than 4 characters,
spaces in hostnames, [^a-z0-9\\-\\.], and other such marginally
useful but infinitely problematic features.
There is real value in KIS, and not just from the perspective of a
security-minded coder...
--
Roger Marquis
Roble Systems Consulting
http://www.roble.com/
