I am using Redhat Linux for my application server. I don't want to usr "root" to start up my application, so I create an user "user" that it can only access this application. But somehow I get an error message "Permission denied:443". After that I found out if I use "root" to start my application, I would not have any problem. I believe "user" didn't have right to open the port or do port forwarding. Do you have any suggestions for me to use "user" to start my application without problems? and how I can turn on port 433 by default?