Disclosed herein are methods, systems, and processes to secure internal services in a distributed environment. A service call initiated by a client process of a client is intercepted. In this example, the service call is a request for an internal service provided by a server deployed in a target appliance. The client is deployed in a source appliance. The service call includes an identifier, and the identifier identifies the internal service. If one or more rules are specified for the identifier, a service packet is generated by multiplexing client information associated with the client process as well as information in the service call. The service packet is forwarded to the target appliance.