fail2ban-pushover-notifications

A very simple method of implementing Pushover notifications via fail2ban

Installation

1. Update pushover.sh with your Pushover tokens, else it won't work.
2. Add pushover.log and pushover.sh to your /etc/fail2ban folder. Ensure proper permissions are set for the script.
3. Add pushover.conf to /etc/fail2ban/action.d/
4. You must add the following to /etc/fail2ban/jail.local

action_ph = %(action_)s
            pushover[name="%(__name__)s", bantime="%(bantime)s"]

5. Then change your default action to the new action.
   action = %(action_ph)s

6. (optional) You can also override a jail action and keep the standard if you less push notifications.

[sshd]
action = %(action_)s
         pushover[name="%(__name__)s", bantime="%(bantime)s"]

After thoughts

It's worth saying that the Pushover priority levels probably should be changed to match what you want.

As is, thanks to overseas activity, there is a lot of fraudulent ssh attempts happening everywhere now. So the Pushover notification can become quite noisy at times. If such is the case, to avoid alert fatigue, I'd open pushover.sh and change Line 17 to PUSHOVER_PRIORITY=-1 and Line 22 to PUSHOVER_PRIORITY=-2 to lower the noise level.

In the future, I may try to add the ability to specify different priorities based on jail configuration.