In the future, you may want to consider posting questions like this to one of the other stack exchange websites like ServerFault. It would have been nice for the person who did that to explain why they voted it down. Your question was voted down because it has little to do with programming and more to do with networking and system administration. That would result in your ssh client taking several-many seconds to time out. Just so you know, a firewall can be configured to drop packets instead of respond to them. Are all the machines on the same local network? Is there a firewall or AWS security group or anything else in between the server and the client that may be filtering requests. The next most obvious thing that would generate a rst packet in response to an outgoing ssh request is a firewall. From your question it sounds like you have tested that not to be the case. This can happen if the remote machine received your request to initiate a connection but no process is listening on that port. It means that your machine sent a syn (or synchronize) packet to initiate a connection and that it received a tcp rst (or reset) packet in response. " Connection refused" is different than "Connection timeout". A machine received your request and sent something back saying "Nothing is listening here"
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