Port 2181 — ZooKeeper

TCP · Port 2181/TCP is used for ZooKeeper, a distributed configuration service for coordinating and managing large-scale distributed systems. It provides a centralized registry of configuration data and allows clients to read and write this data. This port is critical for maintaining the integrity and consistency of distributed system configurations.

Port Number: 2181
Service Name: ZooKeeper
Protocol: TCP
Common Software: Apache ZooKeeper

Security Notes

Review IANA registry for port 2181 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 2181 used for?

Port 2181 is used for ZooKeeper. Port 2181/TCP is used for ZooKeeper, a distributed configuration service for coordinating and managing large-scale distributed systems. It provides a centralized registry of configuration data and allows clients to read and write this data. This port is critical for maintaining the integrity and consistency of distributed system configurations. Common software: Apache ZooKeeper.

Is port 2181 dangerous to leave open?

Review IANA registry for port 2181 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 2181 is open?

Use nmap: nmap -p 2181 <target> or check locally: ss -tlnp | rg 2181