Error 0x80070005 When Calling the FTP FlushLog Method

I had an interesting question earlier today which I thought was worth sharing. One of my coworkers was trying to use the code sample from my Programmatically Flushing FTP Logs blog, and he was getting the following error: Unhandled Exception: System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))    at Microsoft.Web.Administration.Interop.IAppHostMethodInstance.Execute()    at Sample.Main()…

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Custom Post-Build Events for Compiling FTP Providers

I’ve written a lot of walkthroughs and blog posts about creating custom FTP providers over the past several years, and I usually include instructions like the following example for adding a custom post-build event that will automatically register your extensibility provider in the Global Assembly Cache (GAC) on your development computer: Click Project, and then…

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Adding Custom FTP Providers with the IIS Configuration Editor – Part 2

In Part 1 of this blog series about adding custom FTP providers with the IIS Configuration Editor, I showed you how to add a custom FTP provider with a custom setting for the provider that is stored in your IIS configuration settings. For my examples, I showed how to do this by using both the…

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Adding Custom FTP Providers with the IIS Configuration Editor – Part 1

I’ve written a lot of walkthroughs and blog posts about creating custom FTP providers over the past several years, and I usually include instructions for adding these custom providers to IIS. When you create a custom FTP authentication provider, IIS has a user interface for adding that provider to FTP. But if you are adding…

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Restarting the FTP Service Orphans a DLLHOST.EXE Process

I was recently creating a new authentication provider using FTP extensibility, and I ran into a weird behavior that I had seen before. With that in mind, I thought my situation would make a great blog subject because someone else may run into it. Here are the details of the situation: let’s say that you…

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Programmatically Starting and Stopping FTP Sites in IIS 7 and IIS 8

I was recently contacted by someone who was trying to use Windows Management Instrumentation (WMI) code to stop and restart FTP websites by using code that he had written for IIS 6.0; his code was something similar to the following: Option Explicit On Error Resume Next Dim objWMIService, colItems, objItem ‘ Attach to the IIS…

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Troubleshooting Custom FTP Providers with ETW

I recently received a question from a customer about troubleshooting custom FTP providers, and I recommended using the FTP service’s Event Tracing for Windows (ETW) features in order to help troubleshoot the problem. I’ve helped a lot of customers use this little-known feature of the FTP service, so I thought that it would make a…

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Extensibility Updates in the FTP 8.0 Service

A few years ago I wrote a blog that was titled “FTP 7.5 Service Extensibility References”, in which I discussed the extensibility APIs that we added in FTP 7.5. Over the next couple of years I followed that initial blog with a series of walkthroughs on IIS.net and several related blog posts. Here are just…

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Programmatically Flushing FTP Logs

I had a great question from Scott Forsyth earlier today about programmatically flushing the logs for an FTP site. Scott had noticed that there was a FlushLog method listed on the following page in the IIS Configuration Reference: http://www.iis.net/ConfigReference/system.applicationHost/sites/site/ftpServer Unfortunately there wasn’t a code sample for that method; but as luck would have it, I…

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Changing the Identity of the FTP 7 Extensibility Process

Many IIS 7 FTP developers may not have noticed, but all custom FTP 7 extensibility providers execute through COM+ in a DLLHOST.exe process, which runs as NETWORK SERVICE by default. That being said, NETWORK SERVICE does not always have the right permissions to access some of the areas on your system where you may be attempting…

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