Validation of viewstate MAC failed

Hi John

I seem to have an error on the luzzu site I get an MAC Failed error when I try to log in see error log below:

ActiveTabName: Home
RawURL: /default.aspx
AbsoluteURL: /default.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke
ExceptionGUID: 4b2a2dbe-3213-4493-a44c-a34dd31efba7
InnerException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Web.Configuration.MachineKeySection.GetDecodedData
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster,
Source:
Server Name: MS001

What do I need to change in my Snapsis.Pageblaster  config file see attached?

Thanks

Lynn

You shouldn't have to exclude anything, but you could add the word Login to the list of excludes in the global config.
pattern="(Login|jQuery|DesktopModules(?!/snapsis|/Xmod)|LinkClick|\.ashx|SiteMap|/admin/|/host/|feed|rss|captcha|install|thumb|cart|\.asmx)"

Does the error happen only on a specifc browser?

Hi John

I have tried a hard refresh on both but it has not helped see attached image of the same home page for Internet Explorer and FireFox (error message circled in red)

Hi John

The login error shows up in both Internet Explorer and FireFox.

I suspect that the problem of missing colours etc., may be due to my laptop ( I have recently downloaded IE 7)  -  I viewed Snapsis via IE and your site also was without colours

Hi John

I have viewed luzzu with different machines and the Viewstate login error is the same, also the Flash header is missing in all browsers and machines. (the IE colour loss problem is only with the laptop - missing IE file ).
I dont know if this is relevant but the "Validation Viewstate MAC" error message which is only displayed when the login link is clicked - is located in the area where the Flash Header should be.

I have tried a variety of combinations in the Snapsis.Config and web config file but it has not helped.

I managed to eventually login and view the Log Viewer - it is full of exceptions - e.g.

-----------------------------------------------------------------------------------

AssemblyVersion: -1
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL:
AbsoluteURL:
AbsoluteURLReferrer:
UserAgent:
DefaultDataProvider:
ExceptionGUID:
InnerException: Could not load type ''.
FileName:
FileLineNumber: -1
FileColumnNumber: -1
Method:
StackTrace:
Message: System.Web.HttpException: Could not load type ''. ---> System.ArgumentException: String cannot have zero length. at System.Reflection.Assembly._GetType(String name, Boolean throwOnError, Boolean ignoreCase) at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) --- End of inner exception stack trace --- at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) at DotNetNuke.Framework.Reflection.CreateType(String TypeName, String CacheKey, Boolean UseCache, Boolean IgnoreErrors)
Source:
Server Name: MS001

--------------------------------------------------------------------------------------------------------------

I am now trying to get back to PageBlaster default, but commenting out the Static File Handler in web.config causes errors on the page.

I'll turn off the wildcard mapping and see if that helps.

That part of the pattern actually says "Exclude everything in DesktopModules unless it is DesktopModules/Snapsis or DesktopModules/Xmod"

So it should be excluded without adding DataSprings where you added it which really only excludeds it from the exclude, thereby including it again.

I'll take a look to see if I can find out what isn't working.