Hi,First of all which version of portal? 3.x or 4.x?Here is the documentation for 3.5 portal to gateway connectivity.
The default port is 8443 (unless you have manually configured 9443 for the transport?)I would suggest that you ensure portalman API is listening on the gatewayhttps://docops.ca.com/ca-api-developer-portal/3-5/en/set-up-the-api-portal/prepare-the-gateway-for-the-api-portal/4-verify-the-integration-components-work-correctlyRegards
Oh.. AND, you should not connect to a load balanced resource. Connect the portal just to the primary gateway host (the one running your primary DB).Regards