Port 989: FTPS-DATA
Port 989 is the data channel for FTPS, FTP secured with implicit TLS. It pairs with the control channel on port 990 to transfer files with encryption applied from the moment the connection opens.
TCPFile transfer EncryptedIANA assigned
| Port number | 989 |
|---|---|
| Service | FTPS Protocol (data) |
| Protocol | TCP |
| Category | File transfer |
| Default encryption | Yes (TLS/SSH) |
Frequently asked questions
What is port 989 used for?
Port 989 is the data channel for FTPS, FTP secured with implicit TLS. It pairs with the control channel on port 990 to transfer files with encryption applied from the moment the connection opens.
Is port 989 TCP or UDP?
Port 989 (FTPS-DATA) uses TCP.
Is port 989 secure?
Yes. Port 989 carries encrypted traffic by default, so data in transit is protected.
Should I open port 989 on my firewall?
Only if you specifically need FTPS-DATA. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.