Presumably this also detects failed login attempts, so if someone is trying to brute force your login password, you would know immediately. I agree though, tha

Presumably this also detects failed login attempts, so if someone is trying to brute force your login password, you would know immediately. I agree though, that setting up a firewall would be much more effective. Alternatively, disable password authentication in OpenSSH and just use keypairs. But why exactly would you be running any of those services on your Mac anyway? As far as I know, these forms of remote access are disabled by default on OSX (for good reason).