I'm trying to enable port 8080 between a pair of servers running in different availability zones (but the same region) on AWS.
I created a security group, added port 8080 as the port, and added the ID of the security group as the source. I then added this security group to both of the servers.
I am unable to connect from one machine to the other on port 8080, if I change the source to allow all, then I am able to connect.
Have I missed a step? It doesn't matter which group ID I use as the source, I still can't access without leaving it wide open. Is there perhaps another port that needs to be opened to service HTTP requests? The connection isn't refused, it just times out.