Port 989 — FTPS data
Quick reference for TCP/UDP port 989, used by FTPS data. Includes what the service does, security guidance and related ports.
What is port 989?
FTP over TLS data channel.
What port does FTPS data use?
FTPS data listens on port 989 by default.
Is port 989 open? How to check
Run one of these from your computer, replacing HOST with the IP address or domain you want to test.
nc -zv HOST 989
Test-NetConnection HOST -Port 989
nmap -p 989 HOST
A refused or timed-out connection means the port is closed or filtered by a firewall.
Security guidance
Medium risk — open with care
Port 989 (FTPS data) can safely face the internet if you keep the software up to date, restrict admin endpoints, and use TLS where possible. Audit who can reach it and watch your logs.
Related ports
Frequently asked
What is port 989 used for?+
Port 989 is the standard TCP/UDP port for FTPS data. FTP over TLS data channel.
What port does FTPS data use?+
FTPS data listens on port 989 by default.
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