Hello good day
You will have a list of ports that should not be blocked for the operation of jasper server
Anabel Zúñiga Alarcón
If it's just for web browsing reports, it's going to be the port which you've set JasperReports Server with (default:8080).
If you are using email to send reports, you'll need port that you are using for your email. If you are scheduling reports are outputting using ftp or smb, you'll need that ports too. It depends on how you've setup JasperReports Server.
If you are using Linux, just do "netstat -ntlp | grep LISTEN" to find ports that are being used.