Here is my working evn:
Server: linux redhat
My client machine needs to connect to the server using port 1521 to run an application. For some reason (which I am trying to figure out), the application doesn't run. The first step I would like to try in the debug process is to see if the port is not blocked by the server firewall, but not sure which method is accurate.
What I did is to try netstat on the server and got the following:
tcp 0 0 xxx.xxx.xxx.xx:1521 *:* LISTEN
where xxx.xxx.xxx.xx is the IP of the server.
Does that mean the server firewall doesn't block this port??