redhat

Red Hat Linux was a widely used commercial open-source Linux distribution created by Red Hat until its discontinuation in 2004.

• https://www.redhat.com

firewall-cmd

• CentOS 上的 FirewallD 简明指南
• 启动/开机启动
  • systemctl start firewalld / systemctl enable firewalld
• 停止/禁用
  • systemctl stop firewalld / systemctl disable firewalld
• 查看状态
  • firewall-cmd --state
• 开放指定端口
  • firewall-cmd --zone=public --add-port=12345/tcp --permanent
• 关闭指定端口
  • firewall-cmd --zone=public --remove-port=12345/tcp --permanent
• 查看配置
  • firewall-cmd --zone=public --list-all
  • firewall-cmd --list-all-zones 所有区域的配置
• 端口转发 local:80 => local:12345
  • firewall-cmd --zone="public" --add-forward-port=port=80:proto=tcp:toport=12345
• 转发远程主机 local:80 => 123.456.78.9:8080
  • firewall-cmd --zone="public" --add-forward-port=port=80:proto=tcp:toport=8080:toaddr=123.456.78.9
  • 在需要的区域中激活 masquerade firewall-cmd --zone=public --add-masquerade
  • 删除规则 firewall-cmd --zone=public --remove-masquerade
• 应急模式，阻断或放开所有网络
  • firewall-cmd --panic-on / firewall-cmd --panic-off
• ⭐令修改生效（重新加载 FirewallD 配置） firewall-cmd --reload
• Rich Rules

  # 允许来自指定远程主机的所有 IPv4 流量
  firewall-cmd --zone=public --add-rich-rule 'rule family="ipv4" source address=123.456.78.9 accept'
  # 拒绝来自指定主机到 22 端口的 IPv4 的 TCP 流量
  firewall-cmd --zone=public --add-rich-rule 'rule family="ipv4" source address=123.456.78.9 port port=22 protocol=tcp reject'
  # 允许来自指定主机到 80 端口的 IPv4 的 TCP 流量，并将流量转发到 6532 端口上
  firewall-cmd --zone=public --add-rich-rule 'rule family=ipv4 source address=123.456.78.9 forward-port port=80 protocol=tcp to-port=6532'
  # 移除相应 rich rule 
  firewall-cmd --zone=public --remove-rich-rule '... XXXX ...'