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Cloud Security Guidelines for IBM Power Systems by Max Stern, Liviu Rosca, Peter G. Croes, Turgut Aslan

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Troubleshooting SSL and TLS handshake
You can use the AIX and Linux tcpdump and wireshark commands to examine the SSL handshake. Increasing security demands often result in mismatches in security capabilities between servers and endpoints when a secure connection is negotiated using Secure Sockets Layer (SSL) and Transport Layer Security (TLS).
An example might be where a user with an older web browser client is trying to connect to a secure web server that supports only a newer set of encryption protocols. For example TLS 1.2 might be mandated ...

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