Mail Server field is empty.';
die;
}
echo '
Note: To get NS and MX records for the domain, make sure you test a FQDN that has a valid A record. domain.tld should work.
To get SPF record, test SMTP server\'s FQDN with a valid A record or it\'s IP address.
';
// Identify, set data and report info
if ( filter_var( $_POST['domain'] , FILTER_VALIDATE_IP ) ) {
$isIP = true;
} else {
$isIP = false;
}
if ( $isIP ) {
$ip = $_POST['domain'];
$host = $ip;
} else {
$host = strtolower( $_POST['domain'] );
$ip = gethostbyname( $host );
// Get nameservers for the domain
$dns = dns_get_record( $host , DNS_NS );
// Get MX for the domain
$dnsmx = dns_get_record( $host , DNS_MX );
// Get SPF for the domain
$dnstxt = dns_get_record( $host , DNS_TXT );
// Die if Cloud Flare domain
if ( $dns ) {
foreach ( array_reverse( $dns ) as $ns ) {
if ( strpos( $ns['target'] , 'cloudflare.com' ) !== false ) {
echo 'This is a Cloud Flare domain. Data can\'t be collected for this domain.';
die;
}
}
}
if ( $ip == $host ) {
echo 'IP address has not been found for the given domain name.
';
die;
} else {
echo 'Domain Info
Domain: ' . $host .'
IP address: ' . $ip . '
';
}
// Print nameservers for the domain
if ( $dns ) {
echo 'Name Server
';
foreach ( array_reverse( $dns ) as $ns ) {
echo $ns['target'] . '
';
}
}
// Print MX for the domain
if ( $dnsmx ) {
echo 'MX record
';
foreach ( array_reverse( $dnsmx ) as $nmx ) {
echo $nmx['target'] . '
';
}
}
// Print SPF for the domain
if ( $dnstxt ) {
echo 'SPF record
';
foreach ( $dnstxt as $ntxt ) {
if ( strpos( $ntxt['txt'], 'v=spf1' ) !== false ) {
if ( strpos( $ntxt['txt'], $ip ) !== false ) {
echo '' . $ntxt['txt'] . '
';
} elseif ( strpos( $ntxt['txt'], '.' . $host ) !== false ) {
echo '' . $ntxt['txt'] . '
';
} elseif ( strpos( $ntxt['txt'], $host ) !== false ) {
echo '' . $ntxt['txt'] . '
';
} else {
echo '' . $ntxt['txt'] . '
';
}
}
}
}
}
// Print PTR for an IP
echo 'PTR record the IP address
';
echo 'Note: No valid PTR record will be retrieved for the IP address of the server that is hosting this script.
';
$ptr = gethostbyaddr( $ip );
if ( ! $ptr || $ptr == $ip ) {
echo 'No PTR record found.';
} elseif ( $ptr == $host ) {
echo '' . $ptr . '';
} elseif ( strpos( $ptr, $host ) !== false ) {
echo '' . $ptr . '';
} elseif ( $isIP ) {
echo $ptr;
} else {
echo '' . $ptr . '';
}
// Ports
$ports = array( 25, 110, 143, 465, 587, 993, 995 );
// Non SSL ports
$nonssl = array( 25, 110, 143 );
echo 'Mail Ports
';
foreach ( $ports as $port ) {
$connection = @fsockopen( $host, $port, $errno, $errstr, 1 );
if ( is_resource( $connection ) ) {
echo '' . $host . ': ' . $port . ' (' . getservbyport( $port, 'tcp' ) . ') is open.
';
fclose( $connection );
} else {
echo '' . $host . ': ' . $port . ' is not responding.
';
$nonssl[] = $port;
}
}
// Removing closed ports
$sslports = array_diff( $ports, $nonssl );
if ( count( $sslports ) != 0 ) {
echo 'SSL Cert on Ports
';
}
foreach ( $sslports as $sslport ) {
$url = "tcp://" . $host;
$orignal_parse = parse_url( $url, PHP_URL_HOST );
$get = stream_context_create(array(
"ssl" => array(
'capture_peer_cert' => true,
'verify_peer' => false,
'verify_peer_name' => false ) ) );
$read = stream_socket_client( "ssl://" . $orignal_parse . ":" . $sslport, $errno, $errstr, 1, STREAM_CLIENT_CONNECT, $get );
$cert = stream_context_get_params( $read );
$certinfo = openssl_x509_parse( $cert['options']['ssl']['peer_certificate'] );
// Print cert data
echo 'Certificate on port: ' . $sslport . '
';
if ( ! empty( $certinfo['subject']['CN'] ) ) {
if ( $certinfo['subject']['CN'] == $host ) {
echo 'Common Name: ' . $certinfo['subject']['CN'] . '
';
} else {
echo 'Common Name: ' . $certinfo['subject']['CN'] . '
';
}
echo 'Issuer: ' . $certinfo['issuer']['CN'] . '
';
echo 'Valid From: ' . gmdate( 'r', $certinfo['validFrom_time_t'] ) . '
';
if ( strtotime( $certinfo['validTo_time_t'] ) > time() ) {
echo 'Valid To: ' . gmdate( 'r', $certinfo['validTo_time_t'] ) . '';
} else {
echo 'Valid To: ' . gmdate( 'r', $certinfo['validTo_time_t'] ) . '';
}
}
else {
echo 'There is no certificate on the port.';
}
}