I have a frontend deployed on S3 using https. When frontend request backend API (load balancer -> elastic beanstalk) then I got an error: Mixed content. I know that it is because I am calling API via HTTP, not https.
My question is: Should I create a brand new SSL certificate for my LoadBalancer? And how to do this if my load balancer DNS address looks like this: awseb-address.region.elb.amazonaws.com (A Record)
I tried to use this address in Certificate Manager but it is not accepting it.
Should I create a brand new SSL certificate for my LoadBalancer? [...] I tried to use this address in Certificate Manager but it is not accepting it.
You can't register a certificate direclty for awseb-address.region.elb.amazonaws.com.
This is AWS owned domain. To register a SSL certificate, you need to have your own domain that you control. You can acquire one from AWS or on any other domain seller.
However, if already have a domain for your fronted, as you mentioned, then maybe you can use that, and create a subdomain for your ELB. You can have one certificate for multiple domains.
