Tag: iis

ASP.NET Error Validation of viewstate MAC failed

Microsoft-IIS-Generate-MachineKey

In some environments the following error may occur for ASP.NET: 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. There are a few reasons of this error and you can solve …

Continue reading

IIS Error The specified password is invalid. Type a new password.

IIS-the-specified-password-is-invalid-type-a-new-password

The specified password is invalid. Type a new password. You have two options here. The first one is quick and easy – set a password directly in %system32%\inetsrv\config\ApplicationHost.config file in clear text. For obvious reasons I don’t recommend do this in such a way: Be sociable 🙂 Share!

Continue reading

IIS error 503 Application pool identity is invalid

IIS-error-503-application-identity-disabled

Problem After setting custom identity for IIS Application Pool you are experiencing error 503 Service Unavailable in browser and in System section of Event Log on server you may find the following warnings and errors: Event ID 5021: The identity of application pool x is invalid. The user name or password that is specified for …

Continue reading

503 service unavailable compdyn.dll failed to load

IIS-install-dynamic-compression

After moving of IIS site to another server we started receiving 503 Service Unavailable error in browser. Event Viewer showed the following in Application Log: Log Name:      Application Source:        Microsoft-Windows-IIS-W3SVC-WP Date:          7/6/2017 12:46:10 AM Event ID:      2280 Task Category: None Level:         Error Keywords:      Classic User:          N/A Computer:      <computer_name> Description: The Module DLL C:\Windows\System32\inetsrv\compdyn.dll failed to …

Continue reading