In multi-node installations, check that the following ports are accessible for internal services – such as monitoring node status or synchronizing data between nodes.
| Port | Protocol | Source | Destination | 
|---|---|---|---|
| 179 | TCP | All nodes | All nodes | 
| 2379 | TCP | All nodes | All nodes | 
| 2380 | TCP | All nodes | All nodes | 
| 2381 | TCP | All nodes | All nodes | 
| 4789 | UDP | All nodes | All nodes | 
| 5473 | TCP | All nodes | All nodes | 
| 6443 | TCP | All nodes | All nodes | 
| 8000 | TCP | All nodes | All nodes | 
| 9100 | TCP | All nodes | All nodes | 
| 10250 | TCP | localhost | localhost | 
| 15014 | TCP | All nodes | All nodes | 
| 30000 | TCP | localhost | localhost | 
| 51820 | UDP | All nodes | All nodes |