After setting up an FTP server for a change request a security scan has indicated that FTP credentials are being sent in plain-text. Which port or ports are likely being used by the FTP server?
Port 443
Port 20/21
Port 21/22
Port 989
The FTP credentials being sent in plain text indicates that the server is using the standard FTP protocol, which uses port 21 for command and control messages, including the transmission of login credentials. Data transfer, on the other hand, typically uses port 20 in active mode. Port 443 is used by HTTPS. Port 22 is used by SSH. Port 989 is used by FTPS.
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