如何还原 ufw 命令？ [关闭]

Question

我的 Debian 服务器上的sudo ufw status 最初显示以下配置：

Status: active

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

我已经能够通过 sudo ufw allow http 成功允许 http 连接，结果如下：

Status: active

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

什么命令可以扭转这种情况？我试过sudo ufw deny http，但现在sudo ufw status 与原来不同（它现在明确列出http 被拒绝）：

Status: active

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

这和我的初始配置一样吗，还是有不同的命令来恢复sudo ufw allow http？

Answer 1

从 ufw 的手册页，它支持“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