さくらVPS AlmaLinux ファイアウォール確認＆設定方法

sudo systemctl start firewalld

sudo firewall-cmd --state

sudo firewall-cmd --get-active-zones

sudo firewall-cmd --list-all

public (active)
  target: default
  icmp-block-inversion: no
  interfaces: ens3
  sources:
  services: cockpit dhcpv6-client ssh
  ports:
  protocols:
  forward: yes
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

sudo firewall-cmd --zone=public --add-port=80/tcp --permanent

sudo firewall-cmd --reload

sudo firewall-cmd --list-all

  target: default
  icmp-block-inversion: no
  interfaces: ens3
  sources:
  services: cockpit dhcpv6-client ssh
  ports: 80/tcp　　　　⇦ 80/tcpが追加された
  protocols:
  forward: yes
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules: