I have a Meteor/Cordova application hosted in Galaxy, which uses Let’s Encrypt to generate SSL certificates. This has been working great for a long time, but now I am finding that any iOS user that has updated to iOS 10.3 or 10.3.1 can no longer open connections with my server unless I remove my SSL certificate and send them through http.
I’m wondering if anybody else out there has encountered any similar issue since iOS 10.3 was released.
Could be a certificate chain issue (make sure you’re sending the intermediate certificate issued by IdenTrust for Let’s Encrypt), or a ciphersuite issue (make sure your web server is willing to use cryptography that’s compatible with these clients).
https://www.ssllabs.com/ should be able to give some useful information about both of these things.