Kerberos authentication with SSRS across forest trust

  • Hello,

    I am hoping someone can confirm a scenario I am involved in.

    User from an outside domain (DomainB) connects to computer on DomainA and using IE connects to a webserver, which is a front-end to SSRS running on another server. Both webserver and SSRS servers are members of DomainA. DomainA and DomainB are in separate forests with a two-way inter-forest trust between them.

    Kerberos authentication works for users in DomainA, but not for those connecting from DomainB. Is "2 hop" Kerberos authentication not working/supported across a forest trust?

    Thank you very much for your time.

    Igor Akkerman

  • Additional info: ran wireshark and determined that the error is "KDC_ERR_S_PRINCIPAL_UNKNOW". Looks like the domain to which a user belongs (DomainB) doesn't know about the SPN registered in the resource domain (DomainA). So far I have not been able to register SPN in the other domain. Keep getting "Call to DsGetDcNameWithAccountW failed with return value 0

    x00000525".

  • Check out this article

    http://blogs.msdn.com/b/psssql/archive/2009/12/30/cannot-generate-sspi-context-and-service-account-passwords.aspx

    _________________________________________________________________

    "The problem with internet quotes is that you cant always depend on their accuracy" -Abraham Lincoln, 1864

  • I did, doesn't apply to our situation and the error is different - "SEC_E_WRONG_PRINCIPAL". Our issue is that the domain from the trusted forest doesn't know about the SPNs registered in the resource domain in another forest.

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