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Something in the path between the client and the server is blocking the HTTP request. As the same packet is dropped over and over again, this is not random packet-loss. It could be an IPS (Intrusion Prevention System) or maybe a WAF (Web Application Firewall). Or it could be a Loadbalancer that does initiate the 3-way handshake but has to process the HTTP request first and somehow can't. It could also be a NGFW (Next Generation Firewall) that tries to understand the request, but is failing.
- Can you describe the infrastructure between the client and the server?
- Can you show the 32 bytes of the HTTP request? 32 bytes are a bit less than expected, so maybe the request itself is not fully compliant and that is the cause the intermediate device is blocking it.