Getting connection time out after registering URL as new API.

[iamakashk]

Hi Vamsi ,

We have one solution provider called entrego for which we need to whitelist one of the following IP.

1. Server IP on which entrego service is running
2. API gateway IP ( In our case its a GCP Load balancer IP )

To whitelist #2 we have first registered the https://api-staging.entrego.org/v1/authenticate in our api management tool which generated another URL. After calling this URL we are getting connection timed out error on GCP.

Test Case 1:
Following is the current architecture on GCP :

In above diagram #2 Call to entrego via API Gateway is not working. It gives connection timed out every time the URL is being called.

Test Case 2:
To test this we tri

ed from office gateway,

Here we whitelisted office network gateway IP in entrego and URL calls were successful without any issues.

For both test cases direct to call entrego from the microservice is working without any issues.

We are not sure why it is not working when we registered the https://api-staging.entrego.org/v1/authenticate in API Gateway and then whitelist GCP Load balancer IP.

We would like to know your thoughts and if you could guide us to check in a specific direction that would really help.