38 lines
1.7 KiB
Markdown
38 lines
1.7 KiB
Markdown
---
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layout: post
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title: ipv6 with nodejs
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---
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As there are just a few new ipv4 address left in the pool and even those will be [exhausted in under a week](http://inetcore.com/project/ipv4ec/index_en.html) (6 days left, checked right now) the switch to [IPv6](http://en.wikipedia.org/wiki/Ipv6) will be necessary soon.
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My current ISP does not offer any real IPv6 connection and not even my router can handle IPv6 (yet) there's currently no (good & easy) way for me to use IPv6 from here.
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But aside from that fact, my vserver running this blog now has IPv6 addresses (and can even get more).
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[v6.fnordig.de](http://v6.fnordig.de) is available via IPv6, but there's no service running yet.
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I will make this blog accessible via IPv6 soon.
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As I really like [node.js](http://nodejs.org/) I wanted to know how it handles v6 addresses and found [this article on code.danyork.com](http://code.danyork.com/2011/01/20/testing-node-js-with-ipv6-first-step-does-it-work/).
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It's as easy as this:
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var http = require('http');
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var server = http.createServer(function (request, response) {
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response.writeHead(200, {"Content-Type":"text/plain"});
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response.end ("Hello World!\n");
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console.log("Got a connection");
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});
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server.listen(80, "2a01:xxxx:xxxx:xxxx::2");
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console.log("Server running on localhost at port 80");
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Just pass the IPv6 address as the host parameter to `server.listen`.
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This listens on just one IP; it's possible to listen on all, similar to the `0.0.0.0` for IPv4:
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server.listen(80, "::0");</code></pre>
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Other things worth to mention:
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* [World IPv6 Day](http://isoc.org/wp/worldipv6day/): major organisations (Google, Facebook, Yahoo, ...) will offer their content over IPv6 on 8 June, 2011
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So get going and use IPv6!
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