@eskimo, is there solution for the above issue?

Actually, I have checked everything. There is no problem from the server side, it able to get the request and send the response with 403 error code successfully everything is logging properly from the server side, the response is changing into NSURLErrorClientCertificateRequired error, I am sure there is no problem in the request from client side and server side also, And I am able to receive all other responses even 401 response code also, I am facing issue only with 403 response code only.