After talking with you on the #nodejitsu IRC channel, it seems like it really could be a problem with your proxy / firewall.
As was suggested to you in a chat last night, you can always try to use secure connections to websites (wss, not ws) to make sure that this allows your connections to go through.
If this does not work, you will need to send your connection outside your working connection. For example, proxying to your computer at home and using your home network while you work and you want to use websites.
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