How do I verify that I have TLS/SSL connectivity to Duo's service?
From a browser Attempt to reach https://api.duosecurity.com/auth/v2/ping via a web browser on the same network as your server. Successful access will result in a web page displaying a JSON response code. Example: "response": {"time": 1445354727}, "stat": "OK"} This indicates that port 443 is open, which is necessary for communication to our cloud service. Note: This browser test is specific to the device you're testing from and may not have the same egress point as a firewall or other device you're attempting to integrate with Duo. If you are able to access the URL above, check the certificate