I have a 3rd Party Endpoint Url Which I Paste in browser Address bar I can see the XML Data.
But the same Endpoint URL , I invoke via Apex Class (Http Call) I will get a Error Message From the System saying I don't have the Permission to access the Data.
There is No Error in Apex Class.
I checked with 3rd Party Developers..they are saying they have blocked certain IP of Amazon's Server. That might cause the Issue..
What is the Solution..