Using Privileged Ports Between Solaris Systems

If you do not want to run Secure RPC, a possible substitute is the Solaris “privileged port” mechanism. A privileged port is assigned with a port number of less than 1024. After a client system has authenticated the client's credential, the client builds a connection to the server by using the privileged port. The server then verifies the client credential by examining the connection's port number.

Non-Solaris clients, however, might be unable to communicate by using the privileged port. If the clients cannot communicate over the port, you see an error message that is similar to the following:

“Weak Authentication
NFS request from unprivileged port”