To make sure that RS servers can pass necessary communications between them, we recommend that all RS servers have all of the ports listed here open between them.

By default, the cluster assigns ports in the range of 10,000 - 19,999 to database endpoints. If you assign a specific port for a database when you create it, even outside of this range, the cluster only verifies that the assigned port is not already in use. You must manually update your firewall with the port for that new database endpoint.

Ports and port ranges used by Redis Enterprise Software

Protocol Port Description
ICMP * For connectivity checking between nodes
TCP 1968 Internal proxy usage. Ports are bound to loopback adapter.
TCP 3333, 3334, 3335, 3336, 3337, 3338, 3339, 36379, 36380 Internal cluster usage
TCP 8001 For application to access the RS Discovery Service
TCP 8443 For secure (https) access to the management web UI
TCP 8444, 9080 For nginx <-> cnm_http/cm communications on the same host only. Ports are bound to loopback adapter.
TCP 9081 For CRDB management
TCP 8070, 8071 For metrics exported and managed by nginx
TCP 8080, 9443 Used to expose the REST API, including cluster management and node bootstrap
TCP 10000-19999 For exposing databases externally
TCP 20000-29999 For internal communications with database shards
UDP 53, 5353 For accessing DNS/mDNS functionality in the cluster

Changing the Management Web UI Port

If for any reason you want to use a custom port for the RS Web UI instead of the default port (8443), you can change the port. Before you change the RS Web UI port, make sure that the new port is not in use by another process.

Note -

After you change the RS Web UI port, when you add a new node to the cluster you must specify the custom port, in the format:

https://newnode.mycluster.example.com:<nonstandard-port-number>

To change the default port for the RS Web UI, on any node in the cluster run:

rladmin cluster config cm_port <new-port>