In order for Docker Swarm Manager (Master) and Worker nodes to communicate the following ports need to be opened.
On All nodes (Managers and Workers)
TCP 2376
TCP 7946
UDP 7946
UDP 4789
On Manager nodes only
TCP 2377
TCP 9874
In order for Docker Swarm Manager (Master) and Worker nodes to communicate the following ports need to be opened.
On All nodes (Managers and Workers)
TCP 2376
TCP 7946
UDP 7946
UDP 4789
On Manager nodes only
TCP 2377
TCP 9874