[145428] in North American Network Operators' Group
Re: Were A record domain names ever limited to 23 characters?
daemon@ATHENA.MIT.EDU (Owen DeLong)
Fri Oct 7 23:26:55 2011
From: Owen DeLong <owen@delong.com>
In-Reply-To: <CAO0-hXaA-x2ShVUSauot51RB=k92SoLz3APERF3BaaBONhvy_A@mail.gmail.com>
Date: Fri, 7 Oct 2011 20:25:37 -0700
To: Joe Hamelin <joe@nethead.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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Yes, this was because some very old (current at the time, however)
implementations of gethostbyname(3) were implemented in such a way that =
if
the first character they saw returned isdigit()=3D=3DTRUE, then,
they would assume that they had been passed an IP address
and would attempt to encode the string as an IP address rather
than looking it up in /etc/hosts or DNS.
Owen
On Oct 7, 2011, at 7:41 PM, Joe Hamelin wrote:
> On Fri, Oct 7, 2011 at 7:30 PM, Jay Ashworth <jra@baylink.com> wrote:
> ----- Original Message -----
>> "3com.com"
>=20
> I recall that 3M was originally mmm.com because they wouldn't allow a =
number
> to start a domain.
>=20
> /me runs whois mmm.com
>=20
> Yep, Created on..............: 1988-10-31.
>=20
> but wait, 3m.com Created on..............: 1988-05-27.
>=20
> So was the digit as first octet a limitation with some OS or software =
(BIND,
> sendmail, gopher?) or do I have brain-fade?
>=20
> --
> Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474
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