TLS changes

[analog hinge]

We recently received a notification about the upcoming TLS cipher suite requirements change in April 2025. We operate multiple applications connecting to Mollie's API, including some older systems, and need guidance on:

1. What do these changes mean for us exactly?
2. How can we determine which TLS version and cipher suites our applications are currently using to connect to your API?
3. Do you have any diagnostic tools or methods to test if our connections will continue working after your April 2025 changes?
4. For our older applications, what are the recommended minimum library/framework versions that support your new requirements?

We want to ensure a smooth transition and would appreciate any technical guidance! Thanks in advance!!!

[cyan cobalt]

In a typical setup, the cipher suites supported are determined by your OS/distribution. On UNIXoid systems you can typically run openssl ciphers -v to determine which are supported by your system. On Windows machines I guess this KB article is a good starting point.
If there is a common set of cipher suites, everything will continue to work. Only if you're relying on outdates suites due to be removed you'd need to upgrade your system's TLS setup.

[grave bolt]

Thanks, @cyan cobalt ! All good questions, @analog hinge , and appreciate you bringing this up!
We have just sent comms on this topic and will cover it during upcoming Q&A session this Thursday.