Yes, port 990 is considered secure when used for Implicit FTPS.
Understanding Implicit FTPS and Port 990
Implicit FTPS (File Transfer Protocol Secure) is a secure method of file transfer that utilizes SSL/TLS encryption from the very beginning of the connection. Unlike Explicit FTPS, which negotiates encryption after the initial connection, Implicit FTPS automatically initiates an SSL/TLS handshake when a connection is established on port 990. This means that all data transmitted over this port is encrypted, offering a secure way to transfer files.
Key Aspects of Port 990 Security:
- Automatic Encryption: The key benefit of using port 990 for Implicit FTPS is the immediate application of encryption.
- SSL/TLS Handshake: Connections made over this port automatically initiate the secure SSL/TLS handshake, ensuring data protection from the start.
- Data Protection: All data, including user credentials and file contents, are encrypted during transmission, protecting against eavesdropping or unauthorized access.
Contrasting Implicit and Explicit FTPS:
| Feature | Implicit FTPS (Port 990) | Explicit FTPS (Usually Port 21) |
|---|---|---|
| Encryption Start | Automatic | Negotiated |
| Security | More direct and secure | Requires specific command |
| Port | 990 | Typically 21 |
Practical Implications
Using port 990 for FTPS provides a more secure file transfer environment compared to the unencrypted standard FTP. If you need to transfer sensitive information, choosing Implicit FTPS over port 990 is a good practice. Here are a few practical insights:
- Secure Data Transfer: Always prioritize secure transfer methods such as FTPS using port 990 when sending confidential data.
- Configuration Check: If you're using an FTP server, ensure that Implicit FTPS is correctly configured on port 990.
- Firewall Settings: Make sure your firewall allows traffic on port 990 for your FTPS server.
In summary, port 990 is secure because it automatically enforces SSL/TLS encryption from the connection's beginning when using Implicit FTPS. This feature makes it a viable choice for secure file transfers.
