invalid hostname

[Ewan Leith]

As far as I know, almost all restrictions on domain names we're dropped a
year or so ago because of the multi-language changes. After all, a Chinese
website is unlikely to use a a-z as its first character. Also I think domain
names can now be about 255 characters long, though I've never tested this.

Ewan

> -----Original Message-----
> From: Marc Powell [mailto:mpowell at ena.com]
> Sent: 06 May 2003 15:28
> To: Patrick LeBoutillier; Simon Østengaard
> Cc: nagios-users at lists.sourceforge.net
> Subject: RE: [Nagios-users] invalid hostname
> 
> 
> Looks to me like those rules are either no longer valid or 
> are not being adhered to by any of the registrars...
> 
> http://www.dk-hostmaster.dk/dkhostcms/bs?query=2aa.dk&pageid=8
> 2&action=cmsview&lang=da
> 
> http://www.networksolutions.com/cgi-bin/whois/whois?STRING=2go
> .com&SearchType=do
> 
> --
> 
> Marc
> 
> > -----Original Message-----
> > From: Patrick LeBoutillier [mailto:patrick_leboutillier at hotmail.com]
> > Sent: Tuesday, May 06, 2003 8:25 AM
> > To: Simon Østengaard
> > Cc: nagios-users at lists.sourceforge.net
> > 
> > Here is the code that is causing you problems:
> > 
> > /* from RFC-1035
> >  *
> >  * The labels must follow the rules for ARPANET host names. 
>  They must
> >  * start with a letter, end with a letter or digit, and 
> have as interior
> >  * characters only letters, digits, and hyphen.  There are also some
> >  * restrictions on the length.  Labels must be 63 
> characters or less. */
> > 
> > int
> > is_hostname (char *s1)
> > {
> >         if (!s1 || strlen (s1) > 63) {
> >                 return FALSE;
> >         }
> >         if (strcspn (s1,
> > "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUWVXYZ0123456789-.")
> > != 0) {
> >                 return FALSE;
> >         }
> >         if (strspn (s1, "0123456789-.") == 1) {
> >                 return FALSE;
> >         }
> >         while ((s1 = index (s1, '.'))) {
> >                 s1++;
> >                 if (strspn (s1, "0123456789-.") == 1) {
> >                         return FALSE;
> >                 }
> >         }
> >         return TRUE;
> > }
> > 
> > 
> > There seems to be some standard (RFC-1035) for hostnames 
> that does not
> > allow
> > a number as the first character in a hostname label.
> > 
> > Maybe you can create an alias for that host, use the IP 
> address or change
> > the code
> > and recompile your plugins. I suspect the Perl utils.pm 
> will have the same
> > check.
> > 
> > 
> > Cheers,
> > 
> > Patrick
> > 
> > ---------------------
> > Patrick LeBoutillier
> > Laval, Quebec, Canada
> > ----- Original Message -----
> > From: "Simon Østengaard" <simon at ostengaard.dk>
> > To: <nagios-users at lists.sourceforge.net>
> > Sent: Tuesday, May 06, 2003 9:00 AM
> > Subject: [Nagios-users] invalid hostname
> > 
> > 
> > > Hi
> > > I use the check_smtp plugin  ver. 1.3.0
> > >
> > > The plugin refuses to check a host that contains a number in the
> > > beginning of the hosts fully-qualified-domain-name. I.e 
> mail.2aa.dk.
> > >
> > > [root at columbia nagios-plugins-1.3.0]# ./plugins/check_smtp -H
> > mail.2aa.dk
> > > Invalid host name
> > > Usage: check_smtp -H host [-e expect] [-p port] [-f from 
> addr] [-w warn]
> > > [-c crit] [-t timeout] [-v]
> > >        check_smtp --help
> > >        check_smtp --version
> > > [root at columbia nagios-plugins-1.3.0]# telnet mail.2aa.dk 25
> > > Trying 80.80.7.208...
> > > Connected to mail.2aa.dk.
> > > Escape character is '^]'.
> > > 220 mail.2aa.dk ESMTP Tue, 06 May 2003 15:02:58 +0200
> > >
> > >
> > > Any help will be usefull.
> > >
> > > Best regards.
> > > Simon
> > >
> > >
> > >
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> 
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