Site hosting news, tutorials, tips, How Tos and more

How to stop Web Deploy/MSBuild from messing up server permissions

howto

Web Deploy is a fantastic tool to publish your web site to a remote web server. It’s easy, quick, secure, and configurable. However, Web Deploy in conjunction with Visual Studio or in conjunction with MSBuild can alter the account’s permission on the production web server. This is by design. Microsoft believes that a web site is more secure when the web application itself is set to read-only permission. But a lot of functionality is lost with read-only permissions.

First off, let me explain the nature of the problem. Every web site that is hosted on an IIS server will have a specific user to authenticate against the server. The Account Control List will typically have an Anonymous ASPNet IUSR. This is standard for all default web sites. The server does not have to use this user, you can create your own user for the web application to run correctly but let’s stay with the “standard” setup.

Typically the Anonymous ASPNet IUSR will have Read and Write permission to the root and all of the files and subfolders under it. But when you use Web Deploy with Visual Studio or use the MSDeploy command, Microsoft Web Deploy will alter the permission of your Anonymous ASPNet IUSR to have only Read permission. That means any ASP.Net functionality that will perform an upload, file creation, or file modification will fail due to lack of Write permission.

To be honest, Web Deploy itself does not technically alter the permission on the server but one of the properties in MSBuild. So if you use Web Matrix in conjunction with Web Deploy, this is not an issue because Web Matrix does not use MSBuild; Visual Studio does use MSBuild, so with Visual Studio and Web Deploy you can get your permissions skewed.

It is worth noting that if you web deploy your web application to a subfolder this may not be an issue. The reason being is the “Inheritance” feature with NTFS. If the root folder has Read and Write permission, Inheritance will take precedence, and when Web Deploy tries to alter the permission on the subfolder level, the NTFS inherited properties on the root will revert it back to Read and Write. If you decide to Web Deploy directly on the root, then the root folder permission will be altered to Read-only permission and that will get inherited down to the subfolders within that root.

Confusing, I know, but stick with me here. So what is the solution?

There are several ways to fix this problem. One is to get access to the server and reset the permissions manually. If you are using a shared web hosting provider, you’ll need to contact their system administrators to reset it for you. The problem with that is if you use Web Deploy to publish your web application again, then they’ll need to reset the permissions again.

A more viable solution is to alter your project file to prevent Web Deploy from altering the ACL on the remote web server. To accomplish this, simply navigate to your project and find the file with the extension .vbrpoj. If you created your project in C Sharp, look for the project file .csproj. This is outlined in this Winhost Knowledge Base article.

There are still some drawbacks to this. One of the biggest drawbacks and one that tends to confuse developers is where to place the element line in the project. The line you will need to add to your project is

<includesetaclproviderondestination>False</includesetaclproviderondestination>

The project file is grouped to different sections, and you will need to find the section

<propertygroup condition=” ‘$(Configuration)|$(Platform)’ ==’Release|AnyCPU’ “> </propertygroup>

That is where you will include the <includesetaclproviderondestination> element.

Some developers have not been able to get this solution to work. That is due to the ‘Release|AnyCPU’ setting. This setting is for the Configuration and Target Platform. As early as Visual Studio 2005, Microsoft has included the ‘web.config’ Transformation feature. This allows you to create specific elements and values to a web.config file base on the environment. Specific elements may only be suitable for the development environment while the production servers may have different attributes and settings. So depending on how the final build of the project is performed, the project configuration could either be taken from the ‘Release|AnyCPU’ or ‘Debug|AnyCPU’.

If you placed your <includesetaclproviderondestination> within the ‘Release|AnyCPU’ section but built your project within the Debug configuration, then the <includesetaclproviderondestination> attribute may not invoke on the production server. To make sure your permission is not altered create the <includesetaclproviderondestination> attribute on both the ‘Release|AnyCPU’ and ‘Debug|AnyCPU’ group of your project file.

Keep in mind that any for new projects you create, you will need to run through these steps again to keep Web Deploy/MSBuild from altering your permission on the production server. A more permanent solution is to alter the MSBuild publishing settings on your development computer. This will help ensure that any ASP.Net project you create in the future on that specific computer will not alter the permission on the web server when deploying with Web Deploy.

Achieving this is fairly simple and it is a one-time change:

The file you will be modifying is the Microsoft.Web.Publishing.targets file. In Notepad, search for the <includesetaclproviderondestination> element. By default the value is set to True. Set it to False and from that point forward, any ASP.Net projects you create with Visual Studio and initialized the Web Deploy method will not alter the Anonymous ASPNet IUSR’s permission.

Remember, if you are planning to alter and save the Microsoft.Web.Publishing.targets file, you must run Notepad as an administrator.

Rate this article
   

2 Responses
  • Josh Reply

    This was very helpful, thank you!!

  • Sandra Reply

    Thanks alot

Have a comment? Make it here!

This site uses Akismet to reduce spam. Learn how your comment data is processed.