Artifactory maintains an access log (access.log) containing all security-related events, their source IP and context. Events include information on accept/reject of logins, and download, browsing and deployment of artifacts.
The access log is located at $ARTIFACTORY_HOME/logs/access.log.
You can also view and download the access log from the Artifactory UI. In the Admin module go to Advanced | System Logs and select access log from the drop down menu.