add nodejs/myip.js & .gitignore

.gitignore

@@ -0,0 +1,2 @@
+# I don't like coredumps in my git repos.
+*core

nodejs/myip.js

@@ -0,0 +1,37 @@
+#!/usr/bin/env node
+
+// Require the dns module
+var dns = require('dns');
+
+// Set DNS servers to OpenDNS nes
+var servers4 = dns.setServers(["208.67.222.222", "208.67.220.220"])
+
+// Check where myip.opendns.com resolves to and I think this is a function
+// that takes arguments err and addresses.
+dns.resolve4('myip.opendns.com', function (err, addresses) {
+    
+    // In case of error throw the error message?
+    if (err) throw err;
+
+    // Print the first thing in array addresses as it has our IPv4
+    // address.
+    console.log(addresses[0]);
+
+});
+
+/*
+
+// This code makes node codedump for some reason, maybe it has a bug
+// with IPv6 handling or it doesn't like my system not having native
+// or not-Teredo IPv6 connectivity.
+
+var servers6 = dns.setServers(["2620:0:ccc::2", "2620:0:ccd::2"])
+
+dns.resolve6('myip.opendns.com', function (err, addresses) {
+  if (err) throw err;
+
+  console.log(addresses[0]);
+
+});
+
+*/