[EMAIL PROTECTED] wrote on 08/10/2003 09:33:53:
> On Wed, 8 Oct 2003 08:57 am, Gareth Walters wrote:
> > G'day all,
> >
> > Valid characters for hostnames (DNS) are still a-z and - are they not, as
> > per rfc952?
> >
> > I am getting some entries in my mail server logs that suggest there are a
> > few hosts trying to send mail
> > to me with underscores in their names.
> > ---Gareth
>
> You are correct a-z 0-9 are valid anywhere in a host/domain name, the hyphen
> "-" is only valid if it is NOT the first or last character in the
> host/domain name. So "foo-bar" is valid, "-fancyhost-" is invalid.
>
> I've seen plenty of invalid hostnames appearing in my mail/DNS logs and they
> always come from Windows machines. Windows is NOT RFC compliant and will
> allow a clue-challenged user to define whatever characters they want in a
> host/domain name and then dutifully publish them on a public network (eg,
> Internet/DNS etc). Oh yeh, but the world should be that way right? M$ says
> so.
I think you'll find windows is now compliant I'm sure I remember a windows admin bitching when his new win2000 box would not let him use a underscore
Jeff Allison
Operations Manager
Mobile: 61 (0) 410 502702
eMail [EMAIL PROTECTED]
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