Users credentials to access web service

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service

web_development

Hi my scenario is as follows

I have an asp web page
I need to access a web service to download information but to do so I need to use the remote users network credentials (ie they are on a different machine).

My problem is essentially how do I get those credentials?

On the same machine hosting the site I can user identity emulation in combination with windows authentication and the site works fine, I can access the web service. As soon as I try to do this from another machine accessing the website it stops working.

I have debugged it and neither of the possible credentials on the credential cache have any information related to the remote user so accessing the web service fails (these being assigned as its credentials). If I populate a new networkcredential class with the username, domain and password then set it as the service credentials it works fine. But what is the best way to go about this.

I can think of no other way to get the domain, username and password other than by having the user enter it in the login, I then save them to the session state and use them whenever I need to call the service. This does not seem very elegant to me and I am concerned about storing these in the session state. What would be the best way to do this? Is there a way for me to get the credentials of the remote user?

Thanks in advance