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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...Validation of viewstate MAC failed (DNN5)Validation of viewstate MAC failed (DNN5)
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7/8/2013 4:05 AM
 

When user tries to log in, they sometimes get error "Validation of viewstate MAC failed". After the error, they appear to be in logged in state.

This error seems to be happening mainly on new portals imported from an existing portal template. 
We run multpile DotNetNuke portals on one server. 
Our hosting provider thinks it is a caching problem: "please try to change caching settings, refer to the manual."


Why is this happening? 

thanks
Martin

Full error message: An error has occurred. DotNetNuke.Services.Exceptions.PageLoadException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ---> System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ---> System.Web.UI.ViewStateException: Invalid viewstate. Client IP: 194.106.126.66 Port: 54725 User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.110 Safari/537.36 ViewState: 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... --- End of inner exception stack trace --- 



 
New Post
7/16/2013 6:16 AM
 
did you enable dynamic caching for your IIS website?

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
New Post
7/16/2013 6:16 AM
 
did you enable dynamic caching for your IIS website?

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
New Post
7/16/2013 6:16 AM
 
did you enable dynamic caching for your IIS website?

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
New Post
7/16/2013 6:16 AM
 
did you enable dynamic caching for your IIS website?

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...Validation of viewstate MAC failed (DNN5)Validation of viewstate MAC failed (DNN5)


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