// REFERENCE
Port 20 (FTP-DATA)
Protocol: TCP
Service: FTP data
High risk
The data channel of classic FTP (control is port 21). FTP travels unencrypted: credentials and files in the clear. Use SFTP (22) or FTPS (990) instead.
Related tools
Work with this in:
Related
21
Port 21 (FTP) 69
Port 69 (TFTP) 139
Port 139 (NetBIOS Session / SMB) 445
Port 445 (SMB) 873
Port 873 (rsync) 989
Port 989 (FTPS data)
Port 21 (FTP) 69
Port 69 (TFTP) 139
Port 139 (NetBIOS Session / SMB) 445
Port 445 (SMB) 873
Port 873 (rsync) 989
Port 989 (FTPS data)
Assignments per the IANA port registry. Educational content.