Port 7 — echo
Quick reference for TCP/UDP port 7, used by echo. Includes what the service does, security guidance and related ports.
Port
7
Protocol
TCP/UDP
Service
echo
What is port 7?
Echo protocol used for testing connectivity (RFC 862).
What port does echo use?
echo listens on port 7 by default.
Security guidance
Medium risk — open with care
Port 7 (echo) 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 7 used for?+
Port 7 is the standard TCP/UDP port for echo. Echo protocol used for testing connectivity (RFC 862).
What port does echo use?+
echo listens on port 7 by default.
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