Unable to send traces with @opentelemetry/exporter-collector-grpc

[stephenhong]

Hello team, I'm trying to use @opentelemetry/exporter-collector-grpc and I'm able to get it to work when I have url: 'grpc://localhost:4317' for my collectorOptions. But I'm unable to send traces to a collector running on a different ec2 instance. For example, if I have an otel collector running on an ec2 with ip address 1.2.3.4 on port 2222, having url: 'grpc://1.2.3.4:2222' doesn't work. I tried to set up a load balancer and used its DNS name for the url but that didn't work. I also tried to use route 53 record name but that didn't work either. Is there no way to send traces hosted on a different ec2 when using @opentelemetry/exporter-collector-grpc?