If you are impatient or just want to apply my IPv4 blacklist on your webservers or mail servers, then just run:
blacklist-apply.sh https://www.murty.net/ipset.txt
blacklist-gen.sh
Change the following line to suit your website's docroot
RESTORE=/path/to/your-docroot/ipset.txt
Then run the script. It will generate the ipset blacklist file
blacklist-apply.sh
Run on your webservers & mail servers: /root/blacklist-apply.sh https://your-website.com/ipset.txt