識別欺騙性地址

Question

如何找到欺騙性IP地址的原始IP地址？是否有任何工具可以找出？

Answer 1

這應該做的伎倆：

function check_spoofed_ip() 
{ 
    //Check Ip in HTTP Header 
    if (!empty($_SERVER['HTTP_CLIENT_IP'])) 
    { 
     $ip=$_SERVER['HTTP_CLIENT_IP']; 
    } 
    //Is it Proxy Forwarded? 
    elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) 
    { 
     $ip=$_SERVER['HTTP_X_FORWARDED_FOR']; 
    } 
    //Check @ Last, Normal Scenario 
    else 
    { 
     $ip=$_SERVER['REMOTE_ADDR']; 
    } 
    return $ip; //Returns Real IP 
}