Question

determining which SSL ciphers to use in server block

I am following along to the tutorial how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-14-04 and on Step 3 the author suggests I allow only “the most secure SSL protocols and ciphers” and then provides ciphers within some code to add to my server block.

I was wondering if anyone can explain how the author came to decide on these ciphers specifically? After searching I found lots of other ciphers such as the ones provided on mozilla.org or a recommended suite from https://raymii.org.

Could I use these ciphers instead? Should I?

Thanks for reading. As you can see I am trying to understand ciphers.


Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

https://cipherli.st/ maintains a decent list. Also you can use https://www.ssllabs.com/ssltest/ to determine which ciphers you wish to use.

The most recent cipher suites use RSA, ECDH, or ECDSA for authentication, ECDHE for key exchange, AES for encryption, and GCM for integrity, but a large number of older and backward-compatibility cipher suites also exist.

Source - https://securityevaluators.com/knowledge/blog/20150119-protocols/