Stunnel.org
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Stunnel lets you encrypt any TCP connection with SSL/TLS, adding security to existing apps without changing their code. Free, multiplatform, open-source tool.
Add SSL/TLS encryption to any TCP connection
Stunnel is a free, open-source tool that helps you secure your network connections by adding SSL or TLS encryption to any TCP-based service. You don't need to modify your existing applications—just run them through Stunnel to protect sensitive data as it travels across networks.
Whether you're running a server, using a client, or managing a large deployment, Stunnel is designed for security, portability, and scalability. It's easy to set up, works on multiple platforms, and supports advanced features like load balancing. If you want to quickly and reliably encrypt your traffic, Stunnel is a straightforward solution.
You'll find downloads, documentation, and support resources on the site, making it simple to get started or troubleshoot any issues. Stunnel is popular for anyone who needs to upgrade the security of their network communications without complex changes.
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