I made it possible to publicly output and check fail2ban reports on a weekly basis
It is output like this.
fail2ban-report
I have published it above.
In terms of demand, it's quite niche.
Automation
It converts the output of fail2ban-client status <jail> received from standard input into a simple HTML format.
Additionally, this output process is fully automated. In my case, since I have two server machines acting as cache servers, I need to synchronize the output.
This is because otherwise, the HTML file might only exist on one of the Nginx servers.
The mechanism works as follows:
Create a git repository containing the synchronization shell script, static files, and HTML.
git pull to synchronize the repository
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Get rule names from fail2ban-client status
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Pipe fail2ban-client statsu <jail> for existing rules into f2b-report to generate HTML files
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Generate index.html from the *.html files in the current directory
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Copy to the f2b-report directory under /usr/local/www/
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Run git commit && git push
Just set this up in cron and you're done.
Also, the name passed as the first argument to this shell script is used as a prefix to generate the html file.
As for environment variables, I execute it by passing the path to the f2b-report executable and the destination copy path together.