Hello, I just tried to get a simple Zinc server running on the standard HTTP port (80) and it is not working. ZnServer startDefaultOn: 80 My image was run with a standard user. As the standard HTTP port is a privileged port (each port number < 1024 is a privileged port), I tried to run it through sudo. It is not working with PharoLauncher (loss of permissions with the process fork?) but works by running the image directly. The thing that is strange to me is that if I try to run Zinc on a port with not enough permissions, I do not get an error. I saw a test of the socket validity in ZnNetworkingUtils>>serverSocketOn: but I think it is not catching the permissions problem. Is it difficult to detect? If not, it would be good to have an exception if the specified port cannot be used. Christophe.