Security issues with Win2003 and ASPNet app

Discussion in 'ASP .Net Security' started by RichardF, Apr 28, 2005.

  1. RichardF

    RichardF Guest

    I have an ASP.NET Web Service and Web Site. It accesses a SQL
    database for its data and retrieves images from another server.

    There are 4 servers all running Win 2003 as follows...

    1 - Domain Controller
    2 - SQL Server
    3 - IIS Server (runs Web Service and Web Site)
    4 - File Server (stores all the image files)

    I am having lots of issues with permissions because my Web Service is
    running as a user under a LOCAL group IIS_WPG on the IIS Server and I
    don't know how to give it the necessary permissions to access the SQL
    Server and the Images on different machines.

    I think what I need to do is create a Domain Account, give it the
    appropriate permissions and then somehow get my Web Service to run
    using that user account. I did try this using 'impersonate' but then
    it appeared i didn't have permission to tun ASP.NET stuff!

    Can anyone give me tips on how to accomplish this, or point me to a
    resource that explains how I can accomplish this.

    Thanks for any help

    RichardF, Apr 28, 2005
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  2. Hello RichardF,

    you can configure the identity of your web service using the Application
    Pool feature of IIS6.

    Add a new AppPool - give it an identity (local or domain) - and add the web
    service application to the AppPool (WebApp properties)

    Add the account to IIS_WPG and give it access to \windows\\framework\v\temporary files\ and \windows\temp

    Dominick Baier [DevelopMentor], Apr 28, 2005
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  3. RichardF

    RichardF Guest

    Thanks for the help, I will give that a go. (Assuming I can figure
    out how to add a App Pool!)

    Once I do this, how do I then configure permssions on the SQL server
    and Image server machines?

    RichardF, Apr 28, 2005
  4. Hello RichardF,

    if you are using a domain account - just give access to sql server for this
    account / ntfs acls for your file server
    if you are using a local account - recreate that account with same name/password
    on the target machines and proceed as described (not the recommended solution
    - you have to keep all those passwords in sync a.s.o.)
    Dominick Baier [DevelopMentor], Apr 28, 2005
  5. RichardF

    RichardF Guest

    After installing my web service and web site, they had already been
    added to a default App Pool.

    I right clicked the app pool, went to the identity tab and changed it
    to use the domain user account I have created.

    Then I added that domain user account to the IIS_WPG group.

    When I try to access the web site/service from IE on another machine I
    see my initial logon page but after entering a username/password IE
    displays a Service Unavailable message.

    Before I made the changes above, I would get an error indicating that
    SQL had denied me access.

    Did I miss something?

    RichardF, Apr 28, 2005
  6. RichardF

    RichardF Guest

    Actually it appears I now get Service Unavailable whenever I try to
    access IIS on that machine, even the default root website.
    RichardF, Apr 28, 2005
  7. Hello RichardF,

    check the event log! that's most of the time a password typo.

    but the system log will give you more info.

    otherwise change the default apppool back to network service - and try adding
    a new migrating gradually your web apps to this new pool.

    Dominick Baier [DevelopMentor], Apr 28, 2005
  8. RichardF

    RichardF Guest

    The event log says that the identity of my app pool is invalid.

    I created a domain account on the domain server.

    On the SQL Server I gave that account the appropriate permissions.

    On the IIS Server I set the identity of the app pool to use that

    What did I do wrong this time!!!


    (P.S. Thanks for the help so far - I am learning more that I thought I
    wanted to!)

    RichardF, Apr 28, 2005
  9. Did you try logging in to the server with that domain account to be sure
    that you have the credentials right and it can log on locally?

    Joe K.

    Joe Kaplan \(MVP - ADSI\), Apr 28, 2005
  10. Hello Joe,

    and have you cleared "has to change password on first login" ??

    Dominick Baier - DevelopMentor
    Dominick Baier [DevelopMentor], Apr 29, 2005
  11. RichardF

    RichardF Guest

    Logging in works OK, the user and password are OK, but I think I
    messed up the password before.

    I made sure it is OK now.

    So, my web service and web site are in their own app group. It's
    identity is set to the domain user.

    Now, when I try to access the web site from the IIS machine (where it
    is hosted) I get a message saying "File or assembly name XXX.dll, or
    one of its dependencies, was not found"

    Each time i refresh the page the name XXX.dll changes.



    RichardF, Apr 29, 2005
  12. Hello RichardF,

    make sure the account your worker process runs under hat full control to

    \windows\\framework\v1.x\tempory files

    the account is in the IIS_WPG group?

    Dominick Baier - DevelopMentor
    Dominick Baier [DevelopMentor], Apr 29, 2005
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