The EUM Server is the on-premises version of the EUM Cloud that receives, processes, and stores

data from EUM agents. For production installation, AppDynamics recommends that the EUM Server

and the Controller sit on different hosts, and the EUM Server hosts its own MySQL instance. This

improves the scalability and performance of both components. Moreover, AppDynamics strongly

recommends that SSL traffic from agents to the EUM Server is terminated at a reverse proxy that sits

in front of the EUM Server in the network path, and forwards connections to the EUM Server using

HTTP. This relieves the SSL processing load from the EUM Server, simplifies the certificate

management, and enhances the security by isolating the EUM Server from the external Internet.

Therefore, the best implementation mode for deploying an EUM Server with reverse proxy in a

production environment is option D. Reference: EUM Server Deployment, Install a Production EUM

Server, Reverse Proxy configuration for EUM, and Browser EUM installation in the AppDynamics

documentation and community.