Port and firewall Suppose my institution wants to block all incoming HTTP and HTTPS requests, so firewall is configured for blocking access for incoming request to port 80 and 443, but I can configure some other port for my application for listening for HTTP service, let's say 7001. Then in this case how institution would be able to block?

That depends on your equipment and software. For instance, many Cisco devices can use NBAR to do deep packet inspection in order to identify upper layer protocols in use.