I have a Network Load Balancer up and running. I know it is functioning properly because from one EC2 instance i can connect to it fine. However, from others or from my local machine I get "Request timed out" when pinging and "connection timed out" when trying a JDBC connection.
From my understanding Security Groups do not get applied to the Network Load Balancer directly and I should make sure the security group is applied to the target instance. So I am confident it is not a security group issue since I can make connections to the target instance without issue. It is only when going throught the NLB that there is a problem. Also, I have also confirmed the NLB is in a public subnet.
I reviewed Troubleshoot your Network Load Balancer but nothing seems to line up. Could someone please help with what could be the issue?