https://modsecurity.org/docs/4-logging/index.htmlThe purpose of this document is to describe the formats of the ModSecurity alert messages, transaction logs and communication protocols, which would not only allow for a better understanding what ModSecurity does but also for an easy integration with third-party tools and products. Alerts As part of its operations ModSecurity will emit alerts, which are either warnings (non-fatal) or errors (fatal, usually leading to the interception of the transaction in question). Below is an example of a ModSecurity alert entry:Hugoen-US