Hey r/networking I am looking for some guidance on an issue. I am investigating why TLS1.2 is failing after the TLS negotiation.
The session appears to complete the TLS session , resuming previous session and the client and server TLS hellos are sent . The session id is agreed upon and the cipher suite method is also agreed upon between the client and server ssl hello messages.
The Server hello includes the "Change Cipher Specification Encrypted Handshake" . The next message is a Client Handshake message and the the client sends a TCP FIN and shuts down the session.
I have done a packet capture from a source and destination side but I am not learning any new information. I imagine the next step would be investigating the application on the client to determine why is does not send the application data. Any advise would be appreciated.
One thing to keep in mind is the server is actively serving other session to other clients. This is isolated to one site.
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