text: var DNS = require('dns');
  
  var dnsResolve = function(hostname, callback) {
      DNS.resolveNaptr(hostname, callback);
  };
  
  var dnsReverse = function(ip, callback) {
      DNS.reverse(ip, callback);
  };
  
  exports.dnsReverse = dnsReverse;
  exports.dnsResolve = dnsResolve;
  