Elasticsearch

Elasticsearch is a powerful search and analytics engine that allows for real-time data analysis and full-text search capabilities. It is commonly used for log and event data analysis, enabling organizations to gain insights from large volumes of data quickly. Elasticsearch is part of the Elastic Stack, which includes tools like Kibana, Logstash, and Beats.

What is Elasticsearch

Elasticsearch is an open-source, distributed search and analytics engine designed for horizontal scalability, reliability, and real-time search capabilities. It is built on top of Apache Lucene and is known for its speed and scalability, making it a popular choice for applications that require complex search functionalities and real-time data analysis.

Elasticsearch is commonly used in conjunction with other tools in the Elastic Stack, such as Kibana for data visualization, Logstash for data processing, and Beats for data shipping. This combination allows organizations to ingest, search, analyze, and visualize data from various sources in real-time.

Originally developed by Shay Banon and released in 2010, Elasticsearch has grown to become a critical component in many modern data architectures. It is widely used in industries ranging from e-commerce to security, where it helps in monitoring, troubleshooting, and gaining insights from large datasets. The flexibility and power of Elasticsearch make it suitable for a wide range of use cases, including log and event data analysis, full-text search, and business analytics.

Security risk

If port 9300 is open and Elasticsearch is running, it can be a target for unauthorized access and data breaches. Exposing this port without proper security measures can lead to data leaks, unauthorized data manipulation, and potential service disruptions. It is crucial to secure Elasticsearch instances with authentication, encryption, and network access controls to mitigate these risks.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 9200. Use StackChanges to monitor if the Elasticsearch port is closed and stays closed. StackChanges will send an alert if port 9200 is open again.