I’ve read the article you pointed to. What is written there and what you wrote here are absolutely different things. Docker does integrate with firewalld and creates a zone. Have you tried configuring filters for that zone? Ufw is just too dumb because it is suited for workstations that do not forward packets at all, so it cannot be integrated with docker by design.
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Cake day: June 26th, 2023
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1·8 months agoThe best way is to disable password login and use SSH keys only. Any further steps are not required, but you may additionally install fail2ban or sshguard.
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