Single-Signin across servers in same domain

[Kuldeep]

Hi,

I implemented Forms authentication for my apps (more than one). Since it'll
be hosted on a webfarm, I set cookie.domain = "nnn.nnn.co m". This works fine.
I can signin and then go to other servers in same domain.

My problem is the Signout. I know FormsAuthentica tion.Signout() won't work
in this case. So I'm trying to explicitely expire authentication cookie. But
it won't signout and will come back every time. It's driving me crazy. Please
help. Code is given below:

code 1:
System.Web.Http Cookie cookie;
string cookieName =
System.Web.Secu rity.FormsAuthe ntication.Forms CookieName;
cookie = Request.Cookies[cookieName];
cookie.Expires = DateTime.Now.Ad dDays(-1);
cookie.Domain = "xxx.xxx.co m";
cookie.Path = FormsAuthentica tion.FormsCooki ePath;
Response.Cookie s.Add(cookie);
Response.Redire ct(Request.UrlR eferrer.ToStrin g());

I tried this also but no use:
System.Web.Http Cookie cookie;
string cookieName =
System.Web.Secu rity.FormsAuthe ntication.Forms CookieName;
int count = Request.Cookies .Count;
for(int i=0; i < count; i++)
{
cookie = Request.Cookies[i];
if(cookie.Name. Equals(cookieNa me))
{
cookie.Expires = DateTime.Now.Ad dDays(-1);
cookie.Domain = "xx.xxx.com ";
cookie.Path = FormsAuthentica tion.FormsCooki ePath;
Response.Cookie s.Add(cookie);

}
}

Response.Redire ct("/app/main.aspx");