Hello, i am really struggling to understand if what i am trying to do is actually something that is supported by SSD in that terms. I have a lab setup with a Windows Server 2012 with a konfigured KDC, DNS, NTP .. keytab, spn. This setup already works for apache+mod_kerb_auth for both cases, auto-negotiation of existing tickets. So i can do kinit + curl --negotiate on a client and get pass the authentication. Now i am trying to replace apache with nginx with this case. I want to use nginx_pam, and then forward this to sssd using pam_sss. My id_provider is ad, auth_provider is krb5, realm is KWTEST.LOCAL I see that the AD access works using GSSAPI authentication using the provided keytab file, but when a client request though nginx is handled, i see something that sssd is trying to lookup www-data(a)KWTEST.local out of any reason. I would have expected that it uses the HOST requested by the client, like HTTP/mywebservice.lan(a)KWTEST.local - in mod_auth_kerb one can set the SPN to use, i am not sure how this is intended in sssd and that is my actual question. - Can SSSD offer "negotiation" through pam ... nginx at all? (reusing active client krb tokens)

- What SPN is used when pam calls SSSD? I hope i could explain this at least a little ;/ Thank you Eugen

_______________________________________________ sssd-users mailing list -- sssd-users(a)lists.fedorahosted.org To unsubscribe send an email to sssd-users-leave(a)lists.fedorahosted.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedorahosted.org/archives/list/sssd-users@lists.fedorahoste...

Hello Sumit, thank you! I was aware of that nginx module but was striving to get PAM + SSSD for a more robust, maintained solution - so i did not yet test it. TL;dr i tested it with the spengo module and it works without issues - so that one at least. Now my question, as far as i understad SSS supports GSSAPI in general, e.g. for SSH. That said, when setting up nginx + pam + sssd, which one is "not supporting GSSAPI"?

Or is it more the special implementation of "GSSAPI over HTTP" => spengo which nginx_pam does not support? I mean it would basically be part of the webserver to deal with SPENGO - pam / sssd will not able to implement that layer. PAM should return not-authorized, then nginx_pam should send WWW...negotiate .. if the client answeres with any proper header pass this down to pam again (unpack first from base64 .. ). So i suppose that is the very reason sssd cannot implement this at all - it was the wrong way to go about it. If i got it wrong, please correct me :) Pitty i am not able to use sss for kerb now ;/ Best Eugen   On 16. January 2019 at 13:43:45, Sumit Bose (sbose(a)redhat.com) wrote: On Wed, Jan 16, 2019 at 01:26:51PM +0100, Eugen Mayer wrote: > Hello, > > i am really struggling to understand if what i am trying to do is actually something that is supported by SSD in that terms. > > I have a lab setup with a Windows Server 2012 with a konfigured KDC, DNS, NTP .. keytab, spn. > > This setup already works for apache+mod_kerb_auth for both cases, auto-negotiation of existing tickets. So i can do kinit + curl --negotiate on a client and get pass the authentication. > > Now i am trying to replace apache with nginx with this case. I want to use nginx_pam, and then forward this to sssd using pam_sss. > > My id_provider is ad, auth_provider is krb5, realm is KWTEST.LOCAL > > I see that the AD access works using GSSAPI authentication using the provided keytab file, but when a client request though nginx is handled, i see something that sssd is trying to lookup www-data(a)KWTEST.local out of any reason. > > I would have expected that it uses the HOST requested by the client, like HTTP/mywebservice.lan(a)KWTEST.local - in mod_auth_kerb one can set the SPN to use, i am not sure how this is intended in sssd and that is my actual question. > > - Can SSSD offer "negotiation" through pam ... nginx at all? (reusing active client krb tokens) No, what you are looking for is GSSAPI support and it looks like https://github.com/stnoonan/spnego-http-auth-nginx-module might be a suitable module. HTH bye, Sumit > - What SPN is used when pam calls SSSD? > > I hope i could explain this at least a little ;/ > > Thank you > > Eugen > _______________________________________________ > sssd-users mailing list -- sssd-users(a)lists.fedorahosted.org > To unsubscribe send an email to sssd-users-leave(a)lists.fedorahosted.org > Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedorahosted.org/archives/list/sssd-users@lists.fedorahoste... _______________________________________________ sssd-users mailing list -- sssd-users(a)lists.fedorahosted.org To unsubscribe send an email to sssd-users-leave(a)lists.fedorahosted.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedorahosted.org/archives/list/sssd-users@lists.fedorahoste...

_______________________________________________ sssd-users mailing list -- sssd-users(a)lists.fedorahosted.org To unsubscribe send an email to sssd-users-leave(a)lists.fedorahosted.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedorahosted.org/archives/list/sssd-users@lists.fedorahoste...