UFW
# 查看生效规则
sudo ufw status numbered
sudo ufw delete 2
# 开放白名单
sudo ufw allow from 192.168.1.101
# 默认拒绝
sudo ufw default deny incoming
# 允许对外链接
sudo ufw default allow outgoing
# 查看生效规则
sudo ufw status numbered
sudo ufw delete 2
# 开放白名单
sudo ufw allow from 192.168.1.101
# 默认拒绝
sudo ufw default deny incoming
# 允许对外链接
sudo ufw default allow outgoing