The recommendation is to configure the HC with right host and user-agent header but in your case your HC provider doesn't allow you to configure the headers. So there must be a unique header that is set automatically, i don't expect this value to cha...

is there any special header that is automatically added to the HTTP request made by this health check ? We can enhance our health check to match for that header.

Can you configure the health check to pass the host name in the "Host" header ? could you also link us to the documentation page of the health check that you are trying to configure ?

what do you see in that directory ? also if you can tell us what issue you are trying to debug, we can maybe provide a better troubleshooting method.

There was a known issue regarding intermittent 404s - which was fixed in 1.8.3 - https://cloud.google.com/apigee/docs/hybrid/release-notes#December_05_2022 259738092 Intermittent 404's were seen at the Apigee Ingress Gateway due to an inconsistent co...