North American Network Operators Group
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Re: Underscores in host names

  • From: Edward Lewis
  • Date: Thu May 19 11:31:12 2005 
At 8:04 -0700 5/19/05, Roger Marquis wrote:

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 (--, ---, __, ___, ...).
If null were returned for all "host names" containing "--" then IDN names wouldn't "work." (See RFC 3490, section 5.)
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Edward Lewis +1-571-434-5468
NeuStar

If you knew what I was thinking, you'd understand what I was saying.