I can't access gateway host from inside of pod

fisrt , my ingressgateway name is “istio.gateway.abd.com
now i successed deploy the sample of bookinfo and I can visit the “istio.gateway.abd.com/productpage”.

But, when i visit the again inside of the “pod/productpage-v1-c7765c886-v8t57”, it will be 404.

why ? can someone help me ?

what is the result by access your productpage by using http://clusterIP:serviceport in your pod?