To reproduce:

1. Disable your Internet connection (this needs to be done first)

2. Start a io/node repl

3. Enter the following into the repl and note that it fails with ECONNREFUSED:

   var dns = require("dns");
   dns.resolve("google.com", function(err) { if (err) { console.log(err); } else { console.log("online"); }})

4. Re-enable your Internet connection

5. Run dns.resolve("google.com", function(err) { if (err) { console.log(err); } else { console.log("online"); }}) again, and note that it still fails

If the process starts before the Internet connection is disabled, it will work as expected once the connection is re-enabled.

For what it's worth, this bug doesn't affect dns.lookup (which according to the docs is implemented differently than dns.resolve).