DevOps & Cloud
Risk: Low
Port 9411 — Zipkin Distributed Tracing
Port 9411 is the primary HTTP ingestion and query dashboard port for OpenZipkin distributed request tracing across microservice architectures.
PORT NUMBER
9411
PROTOCOL
TCP
DEFAULT PROCESS
java (zipkin)
FIREWALL TARGET
9411/tcp
Instant Terminal Fixes for Port 9411
macOS & Linux Terminal
1. Check who is listening on port 9411:
curl -I http://localhost:9411/health2. Kill process occupying port 9411 (EADDRINUSE fix):
kill -9 $(lsof -t -i:9411)3. UFW Firewall Allow rule:
sudo ufw allow 9411/tcpWindows PowerShell (Admin)
1. Check listening port:
Get-NetTCPConnection -LocalPort 94112. Force kill process on port 9411:
Stop-Process -Id (Get-NetTCPConnection -LocalPort 9411).OwningProcess -Force3. Docker Port Forwarding Mapping:
docker run -d -p 9411:9411 openzipkin/zipkinCommon Error Encountered
Zipkin trace submission failed: Connection refused on port 9411.
Security Advisory & Hardening
Internal observability tool. Isolate behind an authenticated internal ingress.
Frequently Asked Questions
Port 9411 Questions & Answers
Common questions regarding default services, kill commands, and firewall configurations.
Port 9411 is commonly used for Zipkin Distributed Tracing. Port 9411 is the primary HTTP ingestion and query dashboard port for OpenZipkin distributed request tracing across microservice architectures.