The Log4Shell (CVE-2021-44228) zero day vulnerability in the Java logging framework Log4j (versions 2.0 to 2.14.1) was revealed on December 9, 2021. The Apache Foundation assigned the maximum CVSS score of 10 to Log4Shell, as millions of servers and potentially, billions of devices came under risk. Security professionals around the world began patching the vulnerability, and scanning their systems to rule out any potential breach.

Fluentd is an open-source data collector that unifies data collection and consumption. It has different types of plugins that retrieve logs from external sources, parse them, and send them to log management tools like Site24x7 AppLogs. tail, forward, udp, tcp, http, syslog, exec, and windows_eventlog are common input plugins.