sslSecurityProtocol

The connection to a Redis target endpoint using Transport Layer Security (TLS). Valid values include plaintext and ssl-encryption. The default is ssl-encryption. The ssl-encryption option makes an encrypted connection. Optionally, you can identify an Amazon Resource Name (ARN) for an SSL certificate authority (CA) using the SslCaCertificateArn setting. If an ARN isn't given for a CA, DMS uses the Amazon root CA.

The plaintext option doesn't provide Transport Layer Security (TLS) encryption for traffic between endpoint and database.