PORT 4317 / TCPInfrastructure & CloudExposure Risk: Low

Port 4317: OpenTelemetry Collector (gRPC) — OTLP over gRPC Telemetry Ingestion

Standard IANA-registered port for OpenTelemetry Protocol (OTLP) trace, metric, and log ingestion over gRPC.

Default Service

OpenTelemetry Collector (gRPC)

Process: otelcol / jaeger

Transport Protocol

TCP

IANA Registered Port 4317

Docker Port Flag

-p 4317:4317

Container to Host Mapping

How to Check & Kill Process on Port 4317 (EADDRINUSE Fix)

macOS & Linux (lsof / kill)

# Find process using port 4317
sudo lsof -i :4317

# Instantly kill process on port 4317
lsof -ti:4317 | xargs kill -9

Windows (PowerShell & CMD)

# Find PID listening on port 4317
netstat -ano | findstr :4317

# Force kill by PID
taskkill /PID <PID_NUMBER> /F

Cross-Platform Node.js One-Liner

# Kill port 4317 via npx
npx kill-port 4317

# Or diagnose via Castov CLI
npx castov fix "EADDRINUSE :::4317"

Linux Firewall (UFW) & Connectivity Test

# Test if port 4317 is reachable
nc -zv localhost 4317

# Allow or deny port 4317 in UFW
sudo ufw allow 4317/tcp

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Frequently Asked Questions about Port 4317

What is Port 4317 used for?

Port 4317 is the standard network port for OpenTelemetry Collector (gRPC) (OTLP over gRPC Telemetry Ingestion) operating over TCP. The typical system daemon or process is otelcol / jaeger.

How do I kill a process running on Port 4317 (EADDRINUSE)?

On macOS and Linux, run: lsof -ti:4317 | xargs kill -9 (or npx kill-port 4317). On Windows PowerShell/CMD, run: netstat -ano | findstr :4317 and then taskkill /PID <PID> /F.

Is it safe to expose Port 4317 to the internet?

Port 4317 has a Low security risk profile. Standard IANA-registered port for OpenTelemetry Protocol (OTLP) trace, metric, and log ingestion over gRPC.