Delete A Rule In UFW

Say you want to delete a rule in your uncomplicated firewall (ufw). You run ufw help and see that the entry for delete is

delete RULE|NUM                 delete RULE

But when you check the status with sudo ufw status, all you see is this

Status: active

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

Where's the rule number?

What you need is sudo ufw status numbered, which has the rule number in the left hand column.

Status: active

     To                         Action      From
     --                         ------      ----
[ 1] OpenSSH                    ALLOW IN    Anywhere
[ 2] 443                        ALLOW IN    Anywhere
[ 3] OpenSSH (v6)               ALLOW IN    Anywhere (v6)
[ 4] 443 (v6)                   ALLOW IN    Anywhere (v6)

So if you want to delete your OpenSSH rule for IPv6, you know to run sudo ufw delete 3.

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