I went to install Certbot and Lets Encrypt on RHEL 7 on AWS. There is a missing dependency when you try to install with yum and follow the directions.
I was able to resolve the missing dependency by downloading a RPM from rpm find and installing it like:
rpm -i python-zope-interface-4.0.5-4.el7.i686.rpm
Once this is done and I ran certbot to get my certificate, I get a C grade on ssl labs test. I know why and I know how to manually go through the process to fix it, but isn’t a huge part of the benefit of using Certbot to automatically disable ciphers and settings that are not secure?