By default, any host can connect to the Event Manager. It is possible to control the connections by restricting the host machines that access the Event Manager. Enabling the access restriction security option denies access to all hosts, except for those whose IP addresses are listed in the eve.properties file.
When enabling the security option, keep in mind that the restricted host machine cannot access any components of the Event Manager, including the Configuration Server, the Alarm server, and the Agent Container (and all agents housed by the Agent Container).