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P4 Server Administration Documentation | 2025.2

# SSL/TLS connections between client and server

The following sections explain how you set up encrypted communications between a client and a P4 Server.

For any given P4 Server, proxy, or broker, SSL/TLS encryption is an all-or-nothing option: If a P4 Server is configured to use SSL/TLS (presumably for security reasons), all P4 Server applications must be configured to use SSL/TLS. Conversely, if a P4 Server is configured to accept plaintext connections (either for performance reasons or for backwards compatibility), all client applications must connect in plaintext. It is possible however, if you have an intermediary (such as a proxy or a broker) between the client and the P4 Server, that one leg of the communication is encrypted and the following is not. For more information, see SSL/TLS in a mixed environment.

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