Handling exceptions in global.asax ASP.NET MVC

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I have code which is catching all exceptions in Global.asax\[code\] protected void Application_Error(object sender, EventArgs e) { System.Web.HttpContext context = HttpContext.Current; System.Exception exc = context.Server.GetLastError(); var ip = context.Request.ServerVariables["REMOTE_ADDR"]; var url = context.Request.Url.ToString(); var msg = exc.Message.ToString(); var stack = exc.StackTrace.ToString(); }\[/code\]How I can get controller name where this error happenedHow I can get request client IP?And can I filter exceptions? I dont need 404, 504.... erorsthanks