BSNL FTTH ONT port 9090 server - did not work

A custom defined server on the ONT, without configuring anything else, did not work at port 9090. A predefined Shoutcast server, port 8000, also didn't work. Probably BSNL does some firewalling at the gateway. So would probably need some sort of ssh tunneling to run a server over BSNL FTTH.