如何还原ufw命令？

Question

Debian服务器上的sudo ufw status最初显示了以下配置：

Status: active

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere
OpenSSH (v6)               ALLOW       Anywhere (v6)

我已经成功地允许通过sudo ufw allow http进行http连接，这产生了以下结果：

Status: active

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere
80                         ALLOW       Anywhere
OpenSSH (v6)               ALLOW       Anywhere (v6)
80                         ALLOW       Anywhere (v6)

是什么命令来逆转这一点呢？我尝试过sudo ufw deny http，但现在sudo ufw status与原来不同了(它现在明确列出了http被拒绝的列表)：

Status: active

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere
80                         DENY        Anywhere
OpenSSH (v6)               ALLOW       Anywhere (v6)
80                         DENY        Anywhere (v6)

这是否与我的初始配置相同，还是有不同的命令来恢复sudo ufw allow http？

Answer 1

从ufw的手册页面，它支持一个“删除”命令

   delete RULE|NUM
          deletes the corresponding RULE

他们还举了一个例子：

   To delete a rule, simply prefix the original rule with delete with or without the rule comment. For example, if the original rule was:

     ufw deny 80/tcp

   Use this to delete it:

     ufw delete deny 80/tcp

   You may also specify the rule by NUM, as seen in the status numbered output. For example, if you want to delete rule number '3', use:

     ufw delete 3