Port 4000 — Dev server
Quick reference for TCP/UDP port 4000, used by Dev server. Includes what the service does, security guidance and related ports.
Port
4000
Protocol
TCP
Service
Dev server
What is port 4000?
Common dev port (Phoenix, ICQ).
What port does Dev server use?
Dev server listens on port 4000 by default.
Security guidance
Medium risk — open with care
Port 4000 (Dev server) 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 4000 used for?+
Port 4000 is the standard TCP/UDP port for Dev server. Common dev port (Phoenix, ICQ).
What port does Dev server use?+
Dev server listens on port 4000 by default.
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