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copied!<p>By another location do you mean trying to login on 2 different devices?</p> <p>So if I was signed in on my computer and then tried to login on my phone, the phone should not be able to login and should log the user out?</p> <p>If this is correct then:</p> <p>On user session start</p> <ul> <li>if a user is already logged in, sign them out</li> <li>store the login information (IPAddress) in a DB or Application state</li> </ul> <pre><code>if (System.Web.HttpContext.Current.Application[System.Web.HttpContext.Current.User.Identity.Name] != null) { System.Web.HttpContext.Current.Response.Redirect("http://<server>/_layouts/SignOut.aspx"); } else { System.Web.HttpContext.Current.Application[System.Web.HttpContext.Current.User.Identity.Name] = System.Web.HttpContext.Current.Request.UserHostAddress; } </code></pre> <p>On user session end </p> <ul> <li>remove the login information (IPAddress) from DB or Application state</li> </ul> <pre><code>if (System.Web.HttpContext.Current.Application[System.Web.HttpContext.Current.User.Identity.Name] != null && System.Web.HttpContext.Current.Request.UserHostAddress != System.Web.HttpContext.Current.Application[System.Web.HttpContext.Current.User.Identity.Name]) { System.Web.HttpContext.Current.Application.Remove(System.Web.HttpContext.Current.User.Identity.Name); } </code></pre> <p>You could potentially see a problem if you have a long session timeout and try and login to another device before original session is destroyed.</p>

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