Software⏱️ 2 min read📅 2026-05-31

How to Fix: Elasticsearch: Failed to connect to localhost port 9200 - Connection refused

Elasticsearch connection refused error resolved by checking firewall settings and port configuration.

Quick Answer: Check the Elasticsearch service is running on the specified IP address, and ensure the firewall allows incoming connections to port 9200.

The error 'Failed to connect to localhost port 9200: Connection refused' can be caused by a misconfiguration or a temporary issue with your Elasticsearch instance. Since you're able to connect using curl http://localhost:9200, the problem lies in the IP address used in the remote connection.

🛑 Root Causes of the Error

  • Insufficient firewall rules or port blocking.

🛠️ Step-by-Step Verified Fixes

Method 1: Check Firewall Rules

  1. Step 1: Ensure that the port used by Elasticsearch (9200) is open in your firewall rules.

Method 2: Use a Valid IP Address

  1. Step 1: Verify that the IP address you're using is valid and correctly configured.

✨ Wrapping Up

In conclusion, ensure that your Elasticsearch instance is properly configured and accessible via the correct IP address. If you're still experiencing issues, consider consulting your network administrator or Elasticsearch documentation for further assistance.

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