Kévin Chalet • 4/11/2019

Forcing an old .NET application to support TLS 1.2 without recompiling it

This technical article addresses a common problem where legacy .NET Framework 4.0/4.5 applications fail to connect to modern servers requiring TLS 1.2. It explains why simply installing a newer .NET runtime is insufficient and provides a practical, step-by-step solution to force TLS 1.2 support by modifying the application's .exe.config file, referencing Microsoft's best practices. It also includes a note for Windows 7 systems requiring a registry tweak.

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#security #configuration #Net Framework