Internet-Security.com TCP port 22122 details

TCP port 22122 is the default listening port for the FastDFS tracker service (an open-source distributed file system by HappyFish/Alibaba OSS community).
In FastDFS, storage nodes and clients connect to the tracker on 22122 to obtain file locations, report heartbeats, and manage metadata.
The fastdfs-nginx-module (used with Nginx to serve FastDFS files) communicates with the tracker on 22122 in typical deployments.
Popular Docker images and packages for FastDFS (e.g., delron/fastdfs, morunchang/fastdfs) expose 22122 for the tracker endpoint.
Many production FastDFS installations keep this default, so 22122 is commonly observed on FastDFS tracker hosts.

TCP 22122