Detect network card ID in asp.net

Is it possible t开发者_开发技巧o know network card id of the user host computer from where the request is coming like IP address. I am interesting to know if it is possible at IIS or asp.net level or any other possible way of knowing it?

As far as getting network card information is concerned, I see little hope for you here seeing as a client's hardware profile is not something naturally pushed down the wire as a matter of course, however see:

HttpContext.Current.Request.UserHostAddress

Or

HttpContext.Current.Request.ServerVariables("remote_addr")

This value will give you the IP address of the calling client, although they may be hitting you through a proxy and therefore can't be guaranteed to be a machine specific address.

If by "network card ID" you mean the Ethernet MAC address, that's assuming a particular technology on the remote side that you have no way of knowing whether or not it is used. Sure, Ethernet is used pretty much everywhere these days, but are you willing to limit yourself to clients that use that particular hardware architecture? So even if it were possible, I doubt you'd want to go down that route.

If what you want is a unique identifier per client computer, you are probably better off issuing some sort of token yourself. A cookie with a randomly generated session ID should work fairly well.