Hello, I trying to test SIM relay respone using  localhost "http://localhost/cart/payment.asp" and I'm able to process the transaction but never able to get the HTML post from authorize.net. 

I was wondering if it is possible to get the HTML post ( relay response/silent post ) back from Authorize.net to localhost ( not a public internet)? I have used Paypal Payflow link before and I was able to test using localhost. 

Is there anyway I can test it without a public facing website?

Thanks for your help...