Ensuring AWS isn't blocking the specific routes

I have connected DX hosted connection to connect to S3 and the public VIF is up and BGP is also up. How do I ensure that AWS is not blocking the routes to router peer IP? Currently I cannot see the return traffic for ping from the MCN firewall. Do we need to whitelist the MCN firewall public ip from AWS side? The router peer IP and amazon router peer IP have been provided by AWS.