ufw program is used to manage firewalls. Compared with iptables , it is easier to use. By default, sudo apt install ufw needs to be manually installed.
Syntax format: ufw [parameter]
Common parameters:
Example
# 启动ufw enable # 关闭ufw disable # 重启ufw reload # 显示防火墙状态及规则ufw status # 重置配置ufw reset # 允许外部访问80端口ufw allow 80 # 禁止访问80端口ufw delete allow 80 # 只允许特定网段访问ufw allow from 172.21.2.10/24
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