Answer / Shyam Babu

To check if FTP port 21 (and 22 for SSL) are blocked, you can use a tool like 'telnet' or 'nmap'. For example, in Linux/MacOS, type 'telnet your_ip_address 21', and in Windows, use 'nmap -p 21 your_ip_address'. If the connection times out, the port is blocked.

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