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diff --git a/inc/main/classes/client/http/class_HttpClient.ph b/inc/main/classes/client/http/class_HttpClient.ph
new file mode 100644
index 00000000..76a31133
--- /dev/null
+++ b/inc/main/classes/client/http/class_HttpClient.ph
@@ -0,0 +1,96 @@
+
+	/**
+	 * Determines own remote IP address (e.g. can be used to probe if we are
+	 * reachable from outside by determining external address and then connect to it.
+	 * This is accomblished by connecting to the IP of www.shipsimu.org which
+	 * should default to 188.138.90.169 and requesting /ip.php which does only
+	 * return the content of $_SERVER['REMOTE_ADDR']. Of course, this method
+	 * requires a working Internet connection.
+	 *
+	 * This method is taken from a user comment on php.net and heavily rewritten.
+	 * Compare to following link:
+	 * http://de.php.net/manual/en/function.socket-create.php#49368
+	 *
+	 * @return	$externalAddress	The determined external address address
+	 * @todo	Make IP, host name, port and script name configurable
+	 */
+	public static function determineExternalAddress () {
+		// Get helper instance
+		$helperInstance = new ConsoleTools();
+
+		// First get a socket
+		// @TODO Add some DNS caching here
+
+		// Open connection
+		if ($helperInstance->isProxyUsed() === TRUE) {
+			// Resolve hostname into IP address
+			$ip = $helperInstance->resolveIpAddress($helperInstance->getConfigInstance()->getConfigEntry('proxy_host'));
+
+			// Connect to host through proxy connection
+			$socketResource = fsockopen($ip, $helperInstance->getConfigInstance()->getConfigEntry('proxy_port'), $errorNo, $errorStr, 30);
+		} else {
+			// Connect to host directly
+			$socketResource = fsockopen('188.138.90.169', 80, $errorNo, $errorStr, 30);
+		}
+
+		// Check if there was an error else
+		if ($errorNo > 0) {
+			// Then throw again
+			throw new InvalidSocketException(array($helperInstance, $socketResource, $errorNo, $errorStr), BaseListener::EXCEPTION_INVALID_SOCKET);
+		} // END - if
+
+		// Prepare the GET request
+		$request  = 'GET ' . ($helperInstance->isProxyUsed() === TRUE ? 'http://shipsimu.org' : '') . '/ip.php HTTP/1.0' . self::HTTP_EOL;
+		$request .= 'Host: shipsimu.org' . self::HTTP_EOL;
+		$request .= 'User-Agent: ' . $this->getUserAgent() . self::HTTP_EOL;
+		$request .= 'Connection: close' . self::HTTP_EOL;
+
+		// Do we use proxy?
+		if ($helperInstance->isProxyUsed() === TRUE) {
+			// CONNECT method?
+			if ($helperInstance->getConfigInstance()->getConfigEntry('proxy_connect_method') == 'Y') {
+				// Setup proxy tunnel
+				$response = $helperInstance->setupProxyTunnel('shipsimu.org', 80, $socketResource);
+
+				// If the response is invalid, abort
+				if ((count($response) == 3) && (empty($response[0])) && (empty($response[1])) && (empty($response[2]))) {
+					// Invalid response!
+					$helperInstance->debugBackTrace('Proxy tunnel not working: response=' . print_r($response, TRUE));
+				} // END - if
+			} else {
+				// Add header for proxy
+				$request .= 'Proxy-Connection: Keep-Alive' . self::HTTP_EOL;
+			}
+		} // END - if
+
+		// Add last HTTP_EOL
+		$request .= self::HTTP_EOL;
+
+		// Send it to the socket
+		fwrite($socketResource, $request);
+
+		// Init IP (this will always be the last line)
+		$externalAddress = 'invalid';
+
+		// And read the reply
+		while (!feof($socketResource)) {
+			// Get line
+			$externalAddress = trim(fgets($socketResource, 128));
+
+			// Detect HTTP response
+			if ((substr($externalAddress, 0, 7) == 'HTTP/1.') && (substr($externalAddress, -6, 6) != '200 OK')) {
+				// Stop processing
+				break;
+			} // END - if
+		} // END - while
+
+		// Close socket
+		fclose($socketResource);
+
+
+		// Debug message
+		/* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONSOLE-TOOLS[' . __METHOD__ . ':' . __LINE__ . ']: Resolved external address: ' . $externalAddress);
+
+		// Return determined external address
+		return $externalAddress;
+	}