Unable to reach gateway cert url

Hi. In prod environment, we have called https://live.ndhm.gov.in/gateway/v0.5/.well-known/openid-configuration to get cert url which returns the following response
{"jwks_uri":"http://gateway.nha-gw.svc.cluster.local:8000/v0.5/certs"}

when we are hitting cert url http://gateway.nha-gw.svc.cluster.local:8000/v0.5/certs which got from the above response for validation.
It retuned System.Net.Sockets.SocketException (0xFFFDFFFF): Name does not resolve

cc: @sparab

pls check @IntegrationSupport