Port 20 — FTP-DATA
Quick reference for TCP/UDP port 20, used by FTP-DATA. Includes what the service does, security guidance and related ports.
Port
20
Protocol
TCP
Service
FTP-DATA
What is port 20?
FTP data transfer channel.
What port does FTP-DATA use?
FTP-DATA listens on port 20 by default.
Security guidance
Medium risk — open with care
Port 20 (FTP-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 20 used for?+
Port 20 is the standard TCP/UDP port for FTP-DATA. FTP data transfer channel.
What port does FTP-DATA use?+
FTP-DATA listens on port 20 by default.
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