I, recently, started running a Lemmy instance. I am, also, new to Linux servers.
At the advisement of some tech acquaintances, I’ve installed UnnattendedUpgrades and Fail2ban.
What would you recommend?
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Don’t allow root ssh access, you could also change the ssh port to one that’s not 22. Also you could disallow ssh password login and allow key-based authentication only.
Also try to set it up without installing sudo , which will eliminate a lot of privilege escalationvulnerabilities.