public function isDomain($host)
	{
	    $dnsResult = false;
	    //$this->_vhost :  Host.TLD
	    //idn_to_ascii
	    $dnsResult = @dns_get_record( \Idna::encode( $host ), DNS_ANY );
	    if ( $dnsResult )
	    {
	        ModuleVisitorLog::writeLog( __METHOD__ , __LINE__ , ': True' );
	        return true;
	    }
	    ModuleVisitorLog::writeLog( __METHOD__ , __LINE__ , ': False' );
	    return false;
	}