Servers used as Redis Enterprise Software (RS) nodes should ideally have all the below ports open between them for internal cluster communication purposes.

In addition, ensure that the ICMP protocol is enabled for communications between the nodes.

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 creating it, even outside of this range, the cluster will only verify that the assigned port is not already in use. You will have to manually update your firewall with the port for that new database endpoint.

List of ports and port ranges used by Redis Enterprise Software

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

Changing the Management Web UI Port

Note: This only applies to RS 5.0

You may change the port used for the RS Web UI. To do that, run the following command on any node in the cluster as this cluster-wide setting:

$ rladmin cluster config cm_port <new-port>

Before making this change, be sure to check the new port is not already in use by some other process before running this command.

Critical: If you make this change, any time you add a new node to the cluster, you must specify the non-default port number in the management UI URL to join the new node to the cluster. For example,****/