I'm using Java RMI but I need to restrict the number of simultaneous connections to my server.
I know there are a few sun.rmi properties that define this like sun.rmi.transport.tcp.maxConnectionThreads
but I don't know how to change it since there doesn't seem to be a specific method or clas of properties.
It's a system property. You can change it via the command line, or via System.setProperty(), before you execute any RMI code.