Back Button issue after Logout in ASP.NET - onTick, Redirecting works on DEV but not on PROD environment

Hello,

I've been experiencing a very strange behavior on PROD environment.  

I was told to tighten up the security that after logout, user cannot use browser back button to view pages.  Following the reference link below, I make it works on DEV that when user logs out, it clears session and redirects to login page.  However on PROD environment, on Chrome, Network tab, I see LogoutPage.aspx, status canceled in a loop,  the ticker keeps firing... and I can't do anything but close the browser.

http://geekswithblogs.net/Frez/archive/2010/05/18/back-button-issue-after-logout-in-asp.net.aspx

Below is the message in the 'Headers'

Request URL:https://site.com/LogoutPage.aspx
Request Headers
Provisional headers are shown
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Content-Type:application/x-www-form-urlencoded
Origin:https://site.com
Referer:https://site.com/LogoutPage.aspx
User-Agent:Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.124 Safari/537.36
X-DevTools-Emulate-Network-Conditions-Client-Id:1008F0FA-5726-49CF-876E-CC92AB62CB41
Form Dataview sourceview URL encoded
__EVENTTARGET:ctl00$MainContent$Timer1
__EVENTARGUMENT:
__VIEWSTATE:/wEPDwULLTEwMjE0NDM4MjMPZBYCZg9kFgICAw9kFg4CAQ8PFgIeCEltYWdlVXJsBUVodHRwczovL3NtYXJ0dG9vbHMuc3NpLnNhbXN.....




LogoutPage.aspx
/******************************************************************************/
<asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick">  
</asp:Timer>
<script type="text/javascript">
    window.history.forward(1);
</script>
/******************************************************************************/

LogoutPage.aspx.vb
/**************************************************************************************/
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Me.Master.FindControl("TopMenu").Visible = False
        Me.Master.FindControl("LeftMenu1").Visible = False
        Me.Master.FindControl("BreadCrumb1").Visible = False

        Session.Clear()
        Session.Abandon()
        Session.RemoveAll()

        Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1))
        Response.Cache.SetCacheability(HttpCacheability.NoCache)
        Response.Cache.SetNoStore()
 End Sub

Protected Sub Timer1_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        FormsAuthentication.SignOut()
        Response.Redirect("~/LoginPage.aspx", True)
End Sub
/******************************************************************************************/

The problem is I don't have access to PROD so I don't really know what is happening here.  I could replicate the issue on DEV by redirecting to a page not found (LoginPagexxxx.aspx) but that doesn't seem like the issue because 'LoginPage.aspx' is there on PROD, when user is not logged in and tries to access a password protected page, it redirects the user to 'LoginPage.aspx' just fine.

Please tell me what the difference is between DEV & PROD?

Thanks in advance.
levbaoAsked:
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levbaoAuthor Commented:
Never mind.  I solved it by removing the onTick event and put this in master page:

Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1))
Response.Cache.SetCacheability(HttpCacheability.NoCache)
Response.Cache.SetNoStore()

Thanks
0

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