ubuntu 简单使用防火墙命令

sudo ufw status查看防火墙状态

$ sudo ufw status
Status: active

sudo ufw disable关闭防火墙

$ sudo ufw disable
Firewall stopped and disabled on system startup
$ sudo ufw status
Status: inactive

sudo ufw enable启动防火墙

$ sudo ufw enable
Firewall is active and enabled on system startup
$ sudo ufw status
Status: active

sudo ufw allow 端口打开某个端口

$ sudo ufw allow 22
Rule added
Rule added (v6)
$ sudo ufw status
Status: active
To                         Action      From
--                         ------      ----
22                         ALLOW       Anywhere
22 (v6)                    ALLOW       Anywhere (v6)

sudo ufw delete allow 端口关闭某个端口

$ sudo ufw delete allow 22
Rule deleted
Rule deleted (v6)
$ sudo ufw status
Status: active