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Problems requesting computer certificates on an issuing CA

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Problems requesting computer certificates on an issuing CA Anette Andresen 03-21-2006
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Posted by Anette Andresen on March 21, 2006, 8:03 am
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I have a windows server 2003 domain with an enterprise issuing CA. The CA is
set up to allow autoenrollment of computer certificates to a number of
computers in our domain. The computers are given the read, enroll and
autoenroll rights on the computer certificate template. The computer
certificate template is enabled on the issuing CA, and the security on the
CA allows the computers to request certificates. All the other computers
except the CA itself have been able to automatically (or manually) request
certificates, and the CA has signed the requests. However, the CA computer
itself tries to request a computer certificate using autoenrollment every
eight hour, but the CA denies the request with the following Request Status
Code message: "The permissions on this certification authority do not allow
the current user to enroll for certificates" and the following Request
Disposition Message: "Denied by Policy Module". When trying to manully
enroll for a computer certificate using certificate manager mmc, I am able
to open the certificate request wizard and complete the steps there, but
after finishing the wizard I receive the message: "The certification
authority denied the request. The permissions on this certification
authority do not allow the current user to enroll for certificates."

Do anyone know how to solve this problem? Is there some setting I have
forgotten? Or isn't it possible to issue a computer certificate to an
enterprise CA?

Regards,
Anette Andresen



Posted by Paul Adare on March 21, 2006, 8:12 am
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microsoft.public.windows.server.security news group, Anette Andresen

> I have a windows server 2003 domain with an enterprise issuing CA. The CA is
> set up to allow autoenrollment of computer certificates to a number of
> computers in our domain. The computers are given the read, enroll and
> autoenroll rights on the computer certificate template. The computer
> certificate template is enabled on the issuing CA, and the security on the
> CA allows the computers to request certificates. All the other computers
> except the CA itself have been able to automatically (or manually) request
> certificates, and the CA has signed the requests. However, the CA computer
> itself tries to request a computer certificate using autoenrollment every
> eight hour, but the CA denies the request with the following Request Status
> Code message: "The permissions on this certification authority do not allow
> the current user to enroll for certificates" and the following Request
> Disposition Message: "Denied by Policy Module". When trying to manully
> enroll for a computer certificate using certificate manager mmc, I am able
> to open the certificate request wizard and complete the steps there, but
> after finishing the wizard I receive the message: "The certification
> authority denied the request. The permissions on this certification
> authority do not allow the current user to enroll for certificates."
>
> Do anyone know how to solve this problem? Is there some setting I have
> forgotten? Or isn't it possible to issue a computer certificate to an
> enterprise CA?

Since you've enabled the Autoenroll permission on the template you're
obviously not using the default Computer certificate template as that is
a V1 template and only V2 templates support autoenrollment.
What _exactly_ are the permissions on the V2 template?

--
Paul Adare - MVP Virtual Machines
It all began with Adam. He was the first man to tell a joke--or a lie.
How lucky Adam was. He knew when he said a good thing, nobody had said
it before. Adam was not alone in the Garden of Eden, however, and does
not deserve all the credit; much is due to Eve, the first woman, and
Satan, the first consultant." - Mark Twain

Posted by Anette Andresen on March 21, 2006, 8:42 am
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The exact permissions on my template are:

"Authenticated Users" - read
"CA Admins" - read and write
"Domain Admins" - read and write
"Enterprise Admins" - read and write
"Service computers (the computer group)" - read, enroll and autoenroll

By the way, I tried to manually enroll for a computer certificate based on
the default template, but I get the same error as I did with the customized
computer certificate template.

Regards,
Anette

> microsoft.public.windows.server.security news group, Anette Andresen
>
>> I have a windows server 2003 domain with an enterprise issuing CA. The CA
>> is
>> set up to allow autoenrollment of computer certificates to a number of
>> computers in our domain. The computers are given the read, enroll and
>> autoenroll rights on the computer certificate template. The computer
>> certificate template is enabled on the issuing CA, and the security on
>> the
>> CA allows the computers to request certificates. All the other computers
>> except the CA itself have been able to automatically (or manually)
>> request
>> certificates, and the CA has signed the requests. However, the CA
>> computer
>> itself tries to request a computer certificate using autoenrollment every
>> eight hour, but the CA denies the request with the following Request
>> Status
>> Code message: "The permissions on this certification authority do not
>> allow
>> the current user to enroll for certificates" and the following Request
>> Disposition Message: "Denied by Policy Module". When trying to manully
>> enroll for a computer certificate using certificate manager mmc, I am
>> able
>> to open the certificate request wizard and complete the steps there, but
>> after finishing the wizard I receive the message: "The certification
>> authority denied the request. The permissions on this certification
>> authority do not allow the current user to enroll for certificates."
>>
>> Do anyone know how to solve this problem? Is there some setting I have
>> forgotten? Or isn't it possible to issue a computer certificate to an
>> enterprise CA?
>
> Since you've enabled the Autoenroll permission on the template you're
> obviously not using the default Computer certificate template as that is
> a V1 template and only V2 templates support autoenrollment.
> What _exactly_ are the permissions on the V2 template?
>
> --
> Paul Adare - MVP Virtual Machines
> It all began with Adam. He was the first man to tell a joke--or a lie.
> How lucky Adam was. He knew when he said a good thing, nobody had said
> it before. Adam was not alone in the Garden of Eden, however, and does
> not deserve all the credit; much is due to Eve, the first woman, and
> Satan, the first consultant." - Mark Twain



Posted by Paul Adare on March 21, 2006, 9:31 am
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microsoft.public.windows.server.security news group, Anette Andresen

> The exact permissions on my template are:
>
> "Authenticated Users" - read
> "CA Admins" - read and write
> "Domain Admins" - read and write
> "Enterprise Admins" - read and write
> "Service computers (the computer group)" - read, enroll and autoenroll
>
> By the way, I tried to manually enroll for a computer certificate based on
> the default template, but I get the same error as I did with the customized
> computer certificate template.

So then the obvious question is the CA actually a member of "Service
computers (the computer group)" or not?

--
Paul Adare - MVP Virtual Machines
It all began with Adam. He was the first man to tell a joke--or a lie.
How lucky Adam was. He knew when he said a good thing, nobody had said
it before. Adam was not alone in the Garden of Eden, however, and does
not deserve all the credit; much is due to Eve, the first woman, and
Satan, the first consultant." - Mark Twain

Posted by Anette Andresen on March 21, 2006, 12:05 pm
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It is in fact a member of the service computers group.

Regards,
Anette

> microsoft.public.windows.server.security news group, Anette Andresen
>
>> The exact permissions on my template are:
>>
>> "Authenticated Users" - read
>> "CA Admins" - read and write
>> "Domain Admins" - read and write
>> "Enterprise Admins" - read and write
>> "Service computers (the computer group)" - read, enroll and autoenroll
>>
>> By the way, I tried to manually enroll for a computer certificate based
>> on
>> the default template, but I get the same error as I did with the
>> customized
>> computer certificate template.
>
> So then the obvious question is the CA actually a member of "Service
> computers (the computer group)" or not?
>
> --
> Paul Adare - MVP Virtual Machines
> It all began with Adam. He was the first man to tell a joke--or a lie.
> How lucky Adam was. He knew when he said a good thing, nobody had said
> it before. Adam was not alone in the Garden of Eden, however, and does
> not deserve all the credit; much is due to Eve, the first woman, and
> Satan, the first consultant." - Mark Twain



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