IP über Proxy ermitteln

[DaPhreak]

Hat jemand ne Idee, wie ich die IP
eines Clients trotz zwischengeschaltetem Proxy
ermitteln kann (nat. mit PHP) ??

Für Ideen, Anregungen, Denkanstöße bin ich dankbar ...



mfg DaPhreak

[CAITS PowerCounter]

Relativ einfach ,-)

Hier der komplette Code (entnommen aus Power Phlogger von Philip Iezzi und meiner Wenigkeit):

function get_real_IP() {
	global  $HTTP_VIA 
	      , $HTTP_X_COMING_FROM 
	      , $HTTP_CLIENT_IP
	      , $HTTP_X_FORWARDED_FOR 
	      , $HTTP_X_FORWARDED
	      , $HTTP_COMING_FROM 
	      , $HTTP_FORWARDED_FOR 
	      , $HTTP_FORWARDED
		  , $REMOTE_HOST
	      , $REMOTE_ADDR ;
	
	if($HTTP_X_FORWARDED_FOR) { // case 1.A: proxy && HTTP_X_FORWARDED_FOR is defined
		$array = extractIP($HTTP_X_FORWARDED_FOR);
		if ($array && count($array) >= 1) {
			return $array[0]; // first IP in the list
		}
	}
	if($HTTP_X_FORWARDED) { // case 1.B: proxy && HTTP_X_FORWARDED is defined
		$array = extractIP($HTTP_X_FORWARDED);
		if ($array && count($array) >= 1) {
			return $array[0]; // first IP in the list
		}
	}
	if($HTTP_FORWARDED_FOR) { // case 1.C: proxy && HTTP_FORWARDED_FOR is defined
		$array = extractIP($HTTP_FORWARDED_FOR);
		if ($array && count($array) >= 1) {
			return $array[0]; // first IP in the list
		}
	}
	if($HTTP_FORWARDED) { // case 1.D: proxy && HTTP_FORWARDED is defined
		$array = extractIP($HTTP_FORWARDED);
		if ($array && count($array) >= 1) {
			return $array[0]; // first IP in the list
		}
	}
	if($HTTP_CLIENT_IP) { // case 1.E: proxy && HTTP_CLIENT_IP is defined
		$array = extractIP($HTTP_CLIENT_IP);
		if ($array && count($array) >= 1) {
			return $array[0]; // first IP in the list
		}
	}
	/*
	if($HTTP_VIA) {
	// case 2: 
	// proxy && HTTP_(X_) FORWARDED (_FOR) not defined && HTTP_VIA defined
	// other exotic variables may be defined 
	return ( $HTTP_VIA . 
            '_' . $HTTP_X_COMING_FROM .
            '_' . $HTTP_COMING_FROM    
          ) ;
	}
	if( $HTTP_X_COMING_FROM || $HTTP_COMING_FROM ) {
	// case 3: proxy && only exotic variables defined
	// the exotic variables are not enough, we add the REMOTE_ADDR of the proxy
	return ( $REMOTE_ADDR . 
            '_' . $HTTP_X_COMING_FROM .
            '_' . $HTTP_COMING_FROM    
          ) ;
	}
	*/
	
	// case 4: no proxy (or tricky case: proxy+refresh)
	if($REMOTE_HOST) {
		$array = extractIP($REMOTE_HOST);
		if ($array && count($array) >= 1) {
			return $array[0]; // first IP in the list
		}
	}
	
	return $REMOTE_ADDR;
}

Teile des Codes sind auskommentiert da noch auf etwas wackligen Beinen und weitgehend ungetestet mangels entsprechend konfiguriertem Proxyserver. Der Code sollte dir aber weiterhelfen.

[DaPhreak]

danke dir carsten

mfg DaPhreak

[tracer99]

Zur Ergänzung noch die Funktion extractIP aus Phlogger:

    function extractIP($ip) {
    $b = ereg ("^([0-9]{1,3}\.){3,3}[0-9]{1,3}", $ip, $array);
    if ($b) {
            return $array;
        } else {
            return false;
        }
    } 

Gruß tracer

[ghostgambler]

und hier das ganze nochmal E_ALL und register_globals=off sicher

function get_ip() {
    if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { // case 1.A: proxy && HTTP_X_FORWARDED_FOR is defined
        $array = extractIP($_SERVER['HTTP_X_FORWARDED_FOR']);
        if ($array && count($array) >= 1) {
            return $array[0]; // first IP in the list
        }
    }
    if (!empty($_SERVER['HTTP_X_FORWARDED'])) { // case 1.B: proxy && HTTP_X_FORWARDED is defined
        $array = extractIP($_SERVER['HTTP_X_FORWARDED']);
        if ($array && count($array) >= 1) {
            return $array[0]; // first IP in the list
        }
    }
    if (!empty($_SERVER['HTTP_FORWARDED_FOR'])) { // case 1.C: proxy && HTTP_FORWARDED_FOR is defined
        $array = extractIP($_SERVER['HTTP_FORWARDED_FOR']);
        if ($array && count($array) >= 1) {
            return $array[0]; // first IP in the list
        }
    }
    if (!empty($_SERVER['HTTP_FORWARDED'])) { // case 1.D: proxy && HTTP_FORWARDED is defined
        $array = extractIP($_SERVER['HTTP_FORWARDED']);
        if ($array && count($array) >= 1) {
            return $array[0]; // first IP in the list
        }
    }
    if (!empty($_SERVER['HTTP_CLIENT_IP'])) { // case 1.E: proxy && HTTP_CLIENT_IP is defined
        $array = extractIP($_SERVER['HTTP_CLIENT_IP']);
        if ($array && count($array) >= 1) {
            return $array[0]; // first IP in the list
        }
    }
    /*
    if (!empty($_SERVER['HTTP_VIA'])) {
    // case 2: 
    // proxy && HTTP_(X_) FORWARDED (_FOR) not defined && HTTP_VIA defined
    // other exotic variables may be defined 
    return ( $_SERVER['HTTP_VIA'] . 
            '_' . $_SERVER['HTTP_X_COMING_FROM'] .
            '_' . $_SERVER['HTTP_COMING_FROM']    
          ) ;
    }
    if (!empty($_SERVER['HTTP_X_COMING_FROM']) OR !empty($_SERVER['HTTP_COMING_FROM'])) {
    // case 3: proxy && only exotic variables defined
    // the exotic variables are not enough, we add the REMOTE_ADDR of the proxy
    return ( $_SERVER['REMOTE_ADDR'] . 
            '_' . $_SERVER['HTTP_X_COMING_FROM'] .
            '_' . $_SERVER['HTTP_COMING_FROM']    
          ) ;
    }
    */
    
    // case 4: no proxy (or tricky case: proxy+refresh)
    if (!empty($_SERVER['REMOTE_HOST'])) {
        $array = extractIP($_SERVER['REMOTE_HOST']);
        if ($array && count($array) >= 1) {
            return $array[0]; // first IP in the list
        }
    }
    
    return $_SERVER['REMOTE_ADDR'];
}