Have you tryied with ssh? It will be much secure (only 1 port open),
and you'll be able to run spark-shell over the networ. I'm using that
way in my project (https://github.com/data-tsunami/smoke) with good
results.
I can't make a try now, but something like this should work:
ssh -tt ec2-user@YOUR-EC2-IP /path/to/spark-shell SPARK-SHELL-OPTIONS
With this approach you are way more secure (without installing a VPN),
you don't need spark/hadoop installed on your PC. You won't have acces
to local files, but you haven't mentioned that as a requirement :-)
Hope this help you.
Horacio
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