403 Forbidden Error while trying to access External SharePoint site Via Client Object Model

Question

Hi,
I am accessing the External SharePoint site from an intranet. When I try to access local sharepoint site in my intranet via Client object model to upload few documents into a library, it works perfectly fine without any issues.
But when I try to do the same (upload few docs ) to an external SharePoint 2010 site out of my intranet from my intranet, I get 403, forbidden error. It looks like there is some issue with login credentials of this site. But when I try to navigate to the
site URL in Visual studio  2010, it asks for credentials and takes me to home page.
I supplied the credentials in different forms like
ctx.Credentials = new NetworkCredential("username", "password", "domain");
and
clientContext.AuthenticationMode = ClientAuthenticationMode.FormsAuthentication;
and
FormsAuthenticationLoginInfo formsAuthInfo = new FormsAuthenticationLoginInfo("MyUser", "MyPassword");
clientContext.FormsAuthenticationLoginInfo = formsAuthInfo;
but nothing seems working and I get the Same 403 error. What am I missing here?
Thanks,
K.V.N.PAVAN

Answer 1

Hi Pal,
Thanks for posting your query, Just try to add credentials to your clientContext object as mentioned below
NetworkCredential credentials =
     new NetworkCredential("username", "pwd", "domain");
clientContext .Credentials = credentials;
or use
clientContext.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
I hope this will be helpful to you, If this works, Please mark it as Answered.
Regards,
Dharmendra Singh (MCPD-EA | MCTS)
Blog :http://sharepoint-community.net/profile/DharmendraSingh