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Security: run your node in a VPS fortress

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Hi guys,

I've written a Medium post about how to secure your VPS (Ubuntu) by:
- using SSH keys with Ed25519 encryption
- setting a non-default SSH port
- setting the firewall so that only outside access through a single SSH port is allowed
- disabling root access from the outside
- switching to user root with a simple `su -` command, without a password

Check it out at:


Edited by alwin05
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