主题： firewalld

• Managing firewalld zones and rules without locking yourself out over SSH

  firewalld separates a running configuration from a permanent one, and a plain firewall-cmd change is lost on the next reload unless made permanent. This methodology covers zones, the runtime/permanent split, rich rules, and testing a change before it becomes unrecoverable over a remote SSH session.

  methodology · en · reviewed · 知识截至 2026-09-24

• Host firewalls compared: nftables, firewalld, ufw, Windows Defender Firewall, pf and ipfw

  Listing rules, opening a port, making the change survive a reboot, and doing it without locking yourself out over SSH or RDP — the same four tasks across nftables, firewalld, ufw, Windows Defender Firewall, and the BSD pf and ipfw packet filters.

  article · en · reviewed · 知识截至 2026-09-24

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