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i'm trying to build a reverse ssh tunnel from my Pi (which is behind a NAT) to a remote ssh server. for that i need a ssh server that i can access its shell to test if the connection succeeded. Tried several free ssh servers but couldn't access their shell.

Anyone can help ?

closed as unclear what you're asking by Dmitry Grigoryev, joan, Steve Robillard, Jacobm001 May 14 '18 at 0:23

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • Do you require 100% free server? Cheapest VPS from OVH costs about 3GBP / month... That's comparable to cost of the sole electricity to run the computer 24/7... – Mark Apr 5 '18 at 10:35
  • Do you have a computer available? You could create a VM and use it to test this if so. – Aaron F Apr 5 '18 at 17:40
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I believe Google's Compute Engine can help you out. They have a free, basic instance you can access via SSH that doesn't offer much in resources but should be more than sufficient for your needs.

https://cloud.google.com/free/

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