This is a good example of how to respond to an issue with Ansible to ensure that your infrastructure is secure and that the measures you take are consistent across your inventory and are documented.
See the full article here for more details.
The example is am using is an issue that cropped up in the Logwatch report for one of our servers. Logwatch is a utility that scans your logs for patterns that may indicate malicious activity. It is commonly used in partnership with fail2Ban and IPtables to ward of common attacks. In this case the line in the log was:
Connection attempts using mod_proxy: