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AWS has Security Group, NACL, Network Firewall that can block traffic at VPC level. If any of this component is blocking the Traffic, we do not see any explicit message at the OS Level. We see generic errors like "Connection Timeout" or "Couldn't connect to server"
The Error that you see, looks to be explicitly originating from the Windows OS So, as next steps I would recommend checking the Windows Os Firewall Rules
If you want to investigate which Port is used by your Application, you can install "Wireshark" to observe that "Unidirectional Traffic"
Hope this helps.
answered a year ago
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