I am unable to add multiple values in Expected Code(s) field. I have tried with comma separation also like this 403, 2xx but it does not work.
Based on my current settings above, what CF will do if one of my server in loadbalancer returns 404 resource not found error? Will it divert the traffic to another server?
This is for a health check. It is an automated probe which runs and checks for a response. If you are checking the health of a node it should only return one status code to indicate it is healthy.