AWS Elasticache Timeout from EC2

Question

I am getting connection timeout from EC2 trying to connect to AWS Elasticache.

I launched a 1-node elasticache cluster I launched an EC2 instance, made sure availability zone was the same as the cluster, us-west-2b

I did not create a new VPC. I see one is already created.

I ran a nslookup on my elasticache endpoint. It looks like a different /20 than my ec2.

I looked through the documentation and the ec2 launch and did not see where I can specify the subnet, except the availabilty zone.

user_7562147 · Answer

Actually solution is to add security group to elasticache cluster, and this security group should allow 6379 port.

user_5883710 · Answer

First, check the instance security group and check port 6379 is allowed in Inbound.

After that, check your default VPC security group and add inbound rule Custom TCP Rule-6379-Anywhere and save.

I hope this will fix the issue.