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MySQL 8.0 Reference Manual  /  Replication  /  Replication Security

17.3 Replication Security

To protect against unauthorized access to data that is stored on and transferred between replication source servers and replicas, set up all the servers involved using the security measures that you would choose for any MySQL instance in your installation, as described in Chapter 6, Security. In addition, for servers in a replication topology, consider implementing the following security measures:

For Group Replication, binary log encryption and privilege checks can be used as a security measure on replication group members. You should also consider encrypting the connections between group members, comprising group communication connections and distributed recovery connections, and applying IP address allowlisting to exclude untrusted hosts. For information on these security measures specific to Group Replication, see Section 18.5, “Group Replication Security”.