We are seeing that requests to a backend host via the 'Route Via Http(s)' assertion fails with the following:
Problem routing to https://xxxxx:443/xxxxx Error msg: Unable to obtain HTTP response from https://xxxxx:443/xxxxx: Certificate expired or not yet valid: CN=xxxx.com
CA API Gateway
There is an issue with the certificate being presented to the gateway from the backend host.
Executing the following on the gateway showed that the certificate was indeed expired:
openssl s_client -connect BackendHostName:443
Get the certificate updated on the backend host such that it is no longer expired.