因论坛使用了https,突然发现所有IP都变成一个了！

经过网络探索，已解决，X3.5解决方案：

打开文件\source\class\discuz\discuz_application.php 找到如下代码：

	private function _get_client_ip() {
		$ip = $_SERVER['REMOTE_ADDR'];
		if (!array_key_exists('security', $this->config) || !$this->config['security']['onlyremoteaddr']) {
			if (array_key_exists('ipgetter', $this->config) && !empty($this->config['ipgetter']['setting'])) {
				$s = empty($this->config['ipgetter'][$this->config['ipgetter']['setting']]) ? array() : $this->config['ipgetter'][$this->config['ipgetter']['setting']];
				$c = 'ip_getter_'.$this->config['ipgetter']['setting'];
				$r = $c::get($s);
				$ip = ip::validate_ip($r) ? $r : $ip;
			} elseif (isset($_SERVER['HTTP_CLIENT_IP']) && ip::validate_ip($_SERVER['HTTP_CLIENT_IP'])) {
				$ip = $_SERVER['HTTP_CLIENT_IP'];
			} elseif(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
				if (strpos($_SERVER['HTTP_X_FORWARDED_FOR'], ",") > 0) {
					$exp = explode(",", $_SERVER['HTTP_X_FORWARDED_FOR']);
					$ip = ip::validate_ip(trim($exp[0])) ? $exp[0] : $ip;
				} else {
					$ip = ip::validate_ip($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $ip;
				}
			}
		}
		return $ip;
	}

修改为：

private function _get_client_ip() {
        $ip = $_SERVER['REMOTE_ADDR'];
        if (isset($_SERVER['HTTP_X_REAL_FORWARDED_FOR']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_X_REAL_FORWARDED_FOR'])) {
        $ip = $_SERVER['HTTP_X_REAL_FORWARDED_FOR'];
        }
        elseif (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_X_FORWARDED_FOR'])) {
        $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
        }
        elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) {
        $ip = $_SERVER['HTTP_CLIENT_IP'];
        }
        return $ip;

}