Port 19 — chargen
Quick reference for TCP/UDP port 19, used by chargen. Includes what the service does, security guidance and related ports.
What is port 19?
Character generator protocol; rarely enabled, sometimes abused for amplification.
What port does chargen use?
chargen listens on port 19 by default.
Security guidance
Medium risk — open with care
Port 19 (chargen) 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.
Frequently asked
What is port 19 used for?+
Port 19 is the standard TCP/UDP port for chargen. Character generator protocol; rarely enabled, sometimes abused for amplification.
What port does chargen use?+
chargen listens on port 19 by default.
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