Curated port reference

Port 7946: Docker Swarm node discovery

Docker Swarm node discovery commonly uses port 7946 over TCP + UDP. Review its purpose, traffic direction and operational security considerations.

7946TCP + UDP

Docker Swarm node discovery

Docker Swarm node discovery and control-plane gossip traffic.

Typical use

Swarm nodes discovering peers and exchanging overlay-network control information.

Traffic direction

Cluster internal

Security considerations

Permit both transports only between trusted swarm nodes.