CentOS7開放埠，過載防火牆配置

sudo firewall-cmd --zone=public --add-port=6379/tcp --permanent
sudo firewall-cmd --reload

檢查防火牆規則命令

firewall-cmd --list-all

會顯示：

public (active)   # 狀態
  target: default
  icmp-block-inversion: no
  interfaces: ens33    #介面資訊
  sources: 
  services: ssh dhcpv6-client    #開放服務
  ports: 6379/tcp    # 開放埠
  protocols: 
  masquerade: no
  forward-ports: 
  source-ports: 
  icmp-blocks: 
  rich rules: 
 

其他命令：

# 重啟防火牆
systemctl restart firewalld  
# 檢查狀態
firewall-cmd --state
firewall-cmd --list-all
#禁用 firewall
systemctl disable firewalld
systemctl stop firewalld
# 查詢防火牆狀態
systemctl status firewalld
#啟用防火牆
systemctl enable firewalld
systemctl start firewalld
# 查詢防火牆狀態
systemctl status firewalld