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HomeHomeOur CommunityOur CommunityGeneral Discuss...General Discuss...MAC failed? MAC failed?
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11/18/2010 10:20 AM
 
Hyun Cho


Joined: 11/11/2010
Posts: 54
Hi, anyone familiar with the below 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 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 configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ---> System.Web.UI.ViewStateException: Invalid viewstate. Client IP: ::1 Port: 57412 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12 ViewState: VIEWSTATEREMOVEDFORWIDTH
... --- End of inner exception stack trace --- at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter
 
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11/18/2010 12:38 PM
 
Chris Hammond


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Chris Hammond's Avatar

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www.christoc.com
Joined: 1/14/2003
Posts: 7319
Unfortunately it's a common error. I've tracked it down to specific ranges of IP addresses. I think it is just automated bots trying to hack the viewstate on ASP.NET sites. I've never had one get through.
Chris Hammond
Former DNN Corp Employee, MVP, Core Team Member, Trustee
Christoc.com Software Solutions DotNetNuke Module Development, Upgrades and consulting.
dnnCHAT.com a chat room for DotNetNuke discussions
 
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11/18/2010 1:17 PM
 
Hyun Cho


Joined: 11/11/2010
Posts: 54
ok. good to know. thanks Chris.
 
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