Is port 2181 (Apache ZooKeeper) dangerous?

Port 2181 is classified as high risk. It is a common target for automated scanning and brute-force attacks. Restrict access to trusted IPs if exposure is necessary.

Should port 2181 be open on my firewall?

Port 2181 should only be open with strict firewall rules whitelisting trusted IP addresses. Enable rate limiting and intrusion detection systems.

What transport protocol does port 2181 use?

Port 2181 (Apache ZooKeeper) uses the TCP transport protocol and falls under the Database category.

:2181 (TCP)

Apache ZooKeeper

High 风险

TCP — Database

端口概览

端口号 2181

服务名称 Apache ZooKeeper

传输协议 TCP

类别 Database

安全风险 High

端口范围已注册 (1024-49151)

什么是端口 2181?

Port 2181 is the default client port for Apache ZooKeeper, a distributed coordination service. Applications like Apache Kafka, Hadoop, and HBase use ZooKeeper for distributed synchronization, configuration management, and leader election. Exposing this port without authentication can allow unauthorized access to distributed system configurations.

TCP Database 常用

安全注意事项

端口2181（Apache ZooKeeper）被归类为高风险。此端口是自动扫描和暴力破解攻击的常见目标。如必须暴露，请将访问限制为已知IP地址。

建议：使用防火墙规则将可信IP列入白名单。启用速率限制和入侵检测。

Apache ZooKeeper

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端口概览

什么是端口 2181?

安全注意事项

相关端口 — Database

相关术语