[unisog] Centralized auth for web servers
James J. Barlow
jbarlow at ncsa.uiuc.edu
Mon Jul 24 22:02:48 GMT 2006
On Mon, Jul 24, 2006 at 02:42:26PM -0700, Saqib Ali wrote:
> I don't understand your question. How can comprising a service that is
> partipitating in Kerberized environment allow a miscreant to snag
> passwords. In a "true" a kerberos environment the credentials
> (username/password) are never passed to a service, only tickets are.
> for a description of kerberos works.
> If your web servers are using SPNEGO, then a miscreant should never be
> able snag your passwords from the webservers.
Most servers are being set up with mod_auth_kerb:
The username and password is passed to the web server wich then does
the authentication. Definitely not a true kerberos service, but has
been used for years to deal with browsers that do not (and still do not)
pass kerberos tickets.
> Or are you using MS Active Directory as a LDAP server, and not a true kerberos?
> On 7/24/06, James J. Barlow <jbarlow at ncsa.uiuc.edu> wrote:
> > Was wondering if anyone else has any experience in a centralized web
> > authentication application? We seem to have more and more servers
> > being set up at our site that accept kerberos passwords (which authenticate
> > against our centralized kerberos servers), and it's making me a bit
> > nervous. I'm worried about one of those servers getting compromised
> > and then a miscreant could snag lots of peoples kerberos passwords.
> > I'd like a solution where the different web servers could use one server
> > for authentication (which would then be centrally managed), and then
> > use that authenticaton token/cookie, or whatever, for access to their pages.
> > We have looked at Bluestem (https://www-s.uiuc.edu/bluestem/notes/overview.html)
> > and was wondering what other sites may be using. TIA.
> > --
> > James J. Barlow <jbarlow at ncsa.uiuc.edu>
> > Head of Security Operations and Incident Response
> > National Center for Supercomputing Applications Voice : (217)244-6403
> > 1205 West Clark Street, Urbana, IL 61801 Cell : (217)840-0601
> > http://www.ncsa.uiuc.edu/~jbarlow Fax : (217)244-1987
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> Saqib Ali, CISSP, ISSAP
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James J. Barlow <jbarlow at ncsa.uiuc.edu>
Head of Security Operations and Incident Response
National Center for Supercomputing Applications Voice : (217)244-6403
1205 West Clark Street, Urbana, IL 61801 Cell : (217)840-0601
http://www.ncsa.uiuc.edu/~jbarlow Fax : (217)244-1987
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