Ubuntu防火墙管理：ufw安装与配置

查看防火墙状态

root@ecs:~# ufw status
Status: inactive

开启防火墙

root@ecs:~# ufw enable
Command may disrupt existing ssh connections. Proceed with operation (y|n)? y
Firewall is active and enabled on system startup

关闭防火墙

root@ecs:~# ufw disable
Firewall stopped and disabled on system startup

查看防火墙版本

root@ecs:~# ufw version
ufw 0.36.1
Copyright 2008-2021 Canonical Ltd.

允许外部访问

root@ecs:~# ufw default allow
Default incoming policy changed to 'allow'
(be sure to update your rules accordingly)

拒绝外部访问

root@ecs:~# ufw default deny
Default incoming policy changed to 'deny'
(be sure to update your rules accordingly)

允许外部访问80端口

root@ecs:~# ufw allow 80
Rule added
Rule added (v6)

拒绝外部访问80端口

root@ecs:~# ufw deny 80
Rule updated
Rule updated (v6)

允许指定IP访问本机所有端口

root@ecs:~# ufw allow from 192.168.1.9
Rule added