FastCGI is a binary protocol for interfacing interactive programs with a web server. FastCGI is a variation on the earlier Common Gateway Interface (CGI).
If the FastCGI port is exposed, attackers can construct and send binary FastCGI packets to execute arbitrary commands.
It was confirmed that the FastCGI port 9000 is publicly accessible.
The FastCGI port should not be publicly accessible. FastCGI should be configured to listen only on the local interface (127.0.0.1) or to use a unix socket.