invalid hostname

[Patrick LeBoutillier]

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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