---
title: "Requirements for Data Replication"
slug: "installation-data-replication-requirements"
updated: 2026-03-04T12:02:59Z
published: 2026-03-04T14:36:14Z
canonical: "docs.senhasegura.io/installation-data-replication-requirements"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.senhasegura.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Requirements for Data Replication

To ensure efficient data replication in a cluster, you must meet the following requirements:

- [Update](/v4-2/docs/installation-how-to-update-cluster) all instances in the cluster and ensure they are using the same version of the software.
- [Activate the licenses for the instances on the Affinity Portal](/v4-2/docs/installation-how-to-activate-the-senhasegura-license).
- Ensure proper connectivity between all machines. For detailed information, access the articles on [how to configure network interfaces and hostnames](/v4-2/docs/installation-how-to-set-up-the-network-and-change-the-hostname).
- Ensure the following [firewall](/v4-2/docs/installation-firewall-rules) ports are open among all instances:
  - TCP (22, 443, 3306, 4444, 4567, 4568, 59022 e 9300).
  - UDP (4567).