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# general
s
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q
The EC2 instance security groups allow inbound traffic
The network ACL on the subnet seems to be completely open
Bizzarre
No ports listed but I’m able to connect to the management UI.
I guess I don’t understand how ECS port mapping works with load balancers
Can anyone help? I’m pretty stuck.
c
So I am assuming this is EC2 based ECS, which should work similiar to K8. So your port mapping would be say 3000:80, hostport 3000, which would map to your NLB Port. and that proxies to 80 of your container
So since that rabbitmq service doesn't expose a host port I assume your services within the same cluster can communicate over the service discovery name + container port, so long the ACL/SG's allow that communication inbound and outbound