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Articles Tagged: #firewall
Showing 2 verified technical articles tagged with #firewall.
linux 7 min read
How to Fix 'ssh: connect to host port 22: Connection refused' on Linux
Diagnose and resolve SSH port 22 connection refused errors caused by stopped sshd daemons, local firewalls, custom port mismatches, or Fail2ban IP blocks.
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Security & Compliance 15 min read
Linux Server Security in 2026: 15 Practical Steps to Protect a Production Server
A production-tested checklist of 15 essential Linux hardening steps: SSH key authentication, nftables firewalls, Fail2ban, kernel sysctl tuning, auditd, and tested backups.
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