**To authorize cache security group ingress** The following ''authorize-cache-security-group-ingress'' example allows network ingress to a cache security group. :: aws elasticache authorize-cache-security-group-ingress \ --cache-security-group-name "my-sec-grp" \ --ec2-security-group-name "my-ec2-sec-grp" \ --ec2-security-group-owner-id "1234567890" This command produces no output. For more information, see 'Self-Service Updates in Amazon ElastiCache <https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Self-Service-Updates.html>'__ in the *Elasticache User Guide*.