Magento: How to get visitor or guest information and ip address?

//Get Visitor's information
  $visitorData = Mage::getSingleton('core/session')->getVisitorData();
 
  // printing visitor information data
  echo "
"; print_r($visitorData); echo "
";

  // user's ip address (visitor's ip address)
  $remoteAddr = Mage::helper('core/http')->getRemoteAddr(true);
 
  // server's ip address (where the current script is)
  $serverAddr = Mage::helper('core/http')->getServerAddr(true);