title: RegEx for an IP Address
body: <p>I try to extract the value (IP Address) of the wan_ip with this sourcecode:
  Whats wrong?! I´m sure that the RegEx pattern is correct.</p>
  
  <pre><code>String input = @"var product_pic_fn=;var firmware_ver='20.02.024';var wan_ip='92.75.120.206';if (parent.location.href != window.location.href)";
  Regex ip = new Regex(@"[\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b");
  string[] result = ip.Split(input);
  
  foreach (string bla in result)  
  {
    Console.WriteLine(bla);                
  }
  
  Console.Read();
  </code></pre>