Thread: Problems with FCGI/PHP file permissions [Bug?]

Last post 06-24-2008 8:13 AM by knagis. 2 replies.

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06-21-2008, 2:49 PM

knagis
Joined on 06-21-2008, 6:41 PM
Posts 4

Problems with FCGI/PHP file permissions [Bug?]

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Problem: Need to disable access to a fast cgi handler for some application pools / sites.

My solution: deny user (app pool identity) file system permissions to the executable (php-cgi.exe or php.exe for php4).

Strange: if I deny access to the user directly to the executable, all is ok - the fast cgi fails with an unexpected error. But - if I deny access to a group that contains the user, fast cgi continues to work fine.

Strange no.2: if the permissions to the php folder is System, Administrators - full control, users - read and execute, fast cgi works. If I remove the users group but add another that contains all the same users (and even everyone) - fast cgi fails. The user from the app pool for the site is not a member of the users group. the users group contains only Aspnet, authenticated users and interactive.

Environment: Vista x64 SP1, PHP 5.2.6, 4.4.8.

06-23-2008, 9:26 PM In reply to

anilr
Joined on 05-23-2006, 10:13 PM
Redmond, WA
Posts 1,090

Re: Problems with FCGI/PHP file permissions [Bug?]

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First of all the app-pool user is member of the Users group - actually all tokens on the system are - since the Users group contains "authenticated users" which contains all tokens on the system. Also, your other symptoms seem to be related to token caching by WAS - search for FlushTokenCache regarding how to get WAS to flush cached app-pool identity tokens.

Anil Ruia
Senior Software Design Engineer
IIS Core Server

06-24-2008, 8:13 AM In reply to

knagis
Joined on 06-21-2008, 6:41 PM
Posts 4

Re: Problems with FCGI/PHP file permissions [Bug?]

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Yes, FlushTokenCache was a solution.

Here is a sample: http://blogs.iis.net/mailant/archive/2007/10/02/new-api-to-avoid-restarting-iis-when-you-add-a-new-app-pool-windows-server-2008-rc0.aspx, or my version:

public static void FlushTokenCache(this ServerManager sm)
{
sm.ApplicationPools.ChildElements["applicationPoolsControl"].Methods["FlushTokenCache"].CreateInstance().Execute();
}

Just a thing to note - after flushing the application pool has to be recycled otherwise it will still use the old tokens.

Now another question: is it possible to flush the tokens just for one application pool?

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