For our websites we use Let’s Encrypt to generate the SSL certs. One of our clients however has issues when he visits websites secured with a Let’s Encrypt SSL certificate. We cannot reproduce the issue, and when we validate the installation of the certificate using NoPadlock, all seems fine (Report here https://www.whynopadlock.com/results/45c5ece0-33a4-4514-825d-7a6df5739a50).
Our guess is that the client is using a Citrix(-like) environment in his office and it could be an internal firewall issue. Has anyone experienced a similar issue? We want to help the client and his system admin to figure out the source of the issue, but I haven’t been able to find anything related sofar.
My domain is:
The client sees an Insecure connection warning in Chrome
My web server is (include version):
The operating system my web server runs on is (include version): CentOs 7 with Plesk Onyx
My hosting provider, if applicable, is:
I can login to a root shell on my machine (yes or no, or I don’t know): no
I’m using a control panel to manage my site (no, or provide the name and version of the control panel): Yes