PostgreSQL Database

PostgreSQL is an open-source relational database management system (RDBMS) that supports SQL standards and offers advanced features. It is widely used for its reliability, data integrity, and extensibility. PostgreSQL is suitable for various applications, from small single-machine applications to large internet-facing applications with many concurrent users.

What is PostgreSQL Database

PostgreSQL, often referred to as Postgres, is an advanced, open-source relational database management system (RDBMS) that has been in active development for over 30 years. It is known for its strong adherence to SQL standards and its extensive feature set, which includes support for complex queries, foreign keys, triggers, views, and transactional integrity.

Originally developed at the University of California, Berkeley, PostgreSQL has grown to become one of the most popular database systems in the world. It is used by a wide range of organizations, from small startups to large enterprises, due to its robustness, scalability, and flexibility. The system is designed to handle a variety of workloads, from single-machine applications to large-scale, multi-user applications.

PostgreSQL's extensibility is one of its key strengths. Users can define their own data types, operators, and index types, and even write custom functions in various programming languages. This makes PostgreSQL a highly adaptable solution for a wide range of data management needs. Additionally, its active community continuously contributes to its development, ensuring that it remains up-to-date with the latest technological advancements.

PostgreSQL Database runs on TCP and UDP port 5432 and is official IANA port.

Security risk

If port 5433 is open and the PostgreSQL service is running, it could be a target for unauthorized access or attacks. Exposing this port without proper security measures, such as strong authentication and encryption, can lead to data breaches, unauthorized data manipulation, and potential data loss. It is crucial to secure this port using firewalls and other security practices to mitigate these risks.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 5432. Use StackChanges to monitor if the PostgreSQL Database port is closed and stays closed. StackChanges will send an alert if port 5432 is open again.