To add comments to a firewall rule in UFW (Uncomplicated Firewall), you can use the --comment option when creating or modifying a rule.
Here's an example of how to use the --comment option to add a comment to a firewall rule:
ufw insert 1 allow --comment "Allow incoming SSH connections"
This command will insert a rule at the top of the UFW firewall rules to allow incoming SSH connections, and add the comment "Allow incoming SSH connections" to the rule.
You can also use the ufw update command to add a comment to an existing rule. For example:
ufw update 1 --comment "Allow incoming SSH connections"
This will update the first rule in the UFW firewall and add the comment "Allow incoming SSH connections" to it.