PORT 6333 / TCPDatabase & CacheExposure Risk: High
Port 6333: Qdrant Vector Database — Qdrant Vector Search Engine REST API & Web UI
Default HTTP REST API and dashboard port for Qdrant AI embeddings and RAG vector search.
Default Service
Qdrant Vector Database
Process: qdrant
Transport Protocol
TCP
IANA Registered Port 6333
Docker Port Flag
-p 6333:6333
Container to Host Mapping
How to Check & Kill Process on Port 6333 (EADDRINUSE Fix)
macOS & Linux (lsof / kill)
# Find process using port 6333 sudo lsof -i :6333 # Instantly kill process on port 6333 lsof -ti:6333 | xargs kill -9
Windows (PowerShell & CMD)
# Find PID listening on port 6333 netstat -ano | findstr :6333 # Force kill by PID taskkill /PID <PID_NUMBER> /F
Cross-Platform Node.js One-Liner
# Kill port 6333 via npx npx kill-port 6333 # Or diagnose via Castov CLI npx castov fix "EADDRINUSE :::6333"
Linux Firewall (UFW) & Connectivity Test
# Test if port 6333 is reachable nc -zv localhost 6333 # Allow or deny port 6333 in UFW sudo ufw allow 6333/tcp
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Frequently Asked Questions about Port 6333
What is Port 6333 used for?
Port 6333 is the standard network port for Qdrant Vector Database (Qdrant Vector Search Engine REST API & Web UI) operating over TCP. The typical system daemon or process is qdrant.
How do I kill a process running on Port 6333 (EADDRINUSE)?
On macOS and Linux, run: lsof -ti:6333 | xargs kill -9 (or npx kill-port 6333). On Windows PowerShell/CMD, run: netstat -ano | findstr :6333 and then taskkill /PID <PID> /F.
Is it safe to expose Port 6333 to the internet?
Port 6333 has a High security risk profile. Default HTTP REST API and dashboard port for Qdrant AI embeddings and RAG vector search.