Well I tried opening my linux server on my Ubantu and I got this error when gamelift->InitSDK() is being called:
asio_connect error: system111(connection refused)
Error getting remote endpoint: system107 (Transport endpoint is not connected)
The same code connect fine on my WindowServer. This only happen on my Linux server. I tried running this on AWS Gamelift, but it just hanged at activation until it return error. Any pointer on how I can solve this?
Well, just open another fleet for you, it should produce the same result. (We already terminated the last one):
Can we have the fleet id and region so we can take a closer look?
Hello? Are you going to check this or not, otherwise I’m gonna shut it down…
Does GameLift local works on Ubantu?
Our logs indicate that the processes are being launched but never communicating. What version of the SDK are you using? Have you had success integrating with GameLiftLocal?
 - https://docs.aws.amazon.com/gamelift/latest/developerguide/integration-testing-local.html
I believe Gamelift local should work as its just a Java jar file.
Also I would check your ports are correctly open and theres no router/network layer blocking those ports from your clients.
Connection errors with Router are one of the common troubles that the users usually get on their systems as well. To fetch a solution can see from How to Setup Netgear EX6100 that will guide to sort out their issues effortlessly.