Firewall rules: opening and closing ports
With the principle of least privilege, open essential ports and close the rest. A practical firewall tutorial with UFW and iptables, along with fixing the lockout error.
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Blog & Learn
Posts tagged #UFW
Practical articles on hosting, servers, security, SEO and online business — in plain, useful language.
Hardening a new Linux server: the first-hour checklist
A practical guide to hardening a fresh Linux server: creating a non-root user, configuring SSH with keys, firewall, automatic updates, and fail2ban — with detailed examples.
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