I am using VYOS server. I used nmap to scan all the open ports.
PORT STATE SERVICE 22/tcp open ssh 111/tcp filtered rpcbind 1521/tcp filtered oracle 1525/tcp filtered orasrv 14520/tcp filtered unknown
According to nmap document, the filtered state is something where nmap is unable to decide whether port is open or not.
I used curl to connect to the port. I see SYN is coming but VYOS is not responding back?
How can I do any one of these?
- Block these ports in vyos permanently.
- Disable the services.