[Freeipa-users] authentication with latest putty fails

Fri Jan 4 17:52:45 UTC 2013

On Fri, Jan 04, 2013 at 04:56:18PM +0100, Han Boetes wrote:
> Your information about the quest putty version seems to be outdated. ;-)
> 
> Quest Softare no longer maintains recent releases of PuTTY. To obtain the
> latest stable release of PuTTY please goto PuTTY Download Page
> * The functionality that was provided by Quest Software's PuTTY packages
> have now been included in the latest releases of PuTTY, making Quest PuTTY
> obsolete.
> 
> 
> I'm testdriving the centrify version at the moment and...

I just downloaded Centrify's version of putty and it is working fine for
me.

About delegating credentials, you might need to set the ok_as_delegate
flag on the host/* service ticket. To do this you can call kadmin.local
on the IPA server and then use

modprinc +ok_as_delegate host/test-server-ipa.realm at REALM

to set the flag.

bye,
Sumit

> 
> ~/debug% cat ~/out
> Using Kerberos authentication
> Using principal fh at REALM
> Got host ticket host/test-server-ipa.domain at REALM
> login as fh at REALM
> 
> Kerberos authentication failed.  Please check
> 1) Unix login name is correct
> 2) Target service principal name is correct
> 3) Kerberos authentication is enabled in SSH server
> 4) Clock in the host is syncrhonized with the clock in AD
> 
> fh at REALM@test-server-ipa's password:
> Last login: Fri Jan  4 14:51:25 2013 from ipa-w7.domain
> [fh at test-server-ipa ~]$ klist
> Ticket cache: FILE:/tmp/krb5cc_1554800011_JDgpIu5465
> Default principal: fh at REALM
> 
> Valid starting     Expires            Service principal
> 01/04/13 14:52:49  01/05/13 14:52:49  krbtgt/REALM at REALM
> [fh at test-server-ipa ~]$
> 
> That's does provide a valid ticket but not a passwordless login. Actually I
> have to enter a pass twice here!
> 
> 
> 
> 
> 
> On Fri, Jan 4, 2013 at 4:25 PM, Sumit Bose <sbose at redhat.com> wrote:
> 
> > On Fri, Jan 04, 2013 at 04:14:36PM +0100, Han Boetes wrote:
> > > You are absolutely right; the credentials aren't forwarded.
> > >
> > > I have enabled the option "allow gssapi credential delegation". So one
> > > would expect that it should work.
> > >
> > > I just installed the mit kerberos tools and I can see all the options and
> > > forwarding tickets is allowed according to the interface. Also putty is
> > now
> > > using the mit kerberos dll; gssapi32.dll and still I get the same
> > results.
> > >
> > > So the proper question is: how do I get putty to really forward the
> > > credentials?
> >
> > This might be an issue with your putty version. Can you try Quest's
> > version of putty http://rc.quest.com/topics/putty/ , if you are not
> > already using it?
> >
> > HTH
> >
> > bye,
> > Sumit
> >
> > >
> > >
> > > On Fri, Jan 4, 2013 at 3:58 PM, Rob Crittenden <rcritten at redhat.com>
> > wrote:
> > >
> > > > Han Boetes wrote:
> > > >
> > > >> I've set up windows with the instructions given over here:
> > > >>
> > > >> http://freeipa.com/page/**Windows_authentication_**against_FreeIPA<
> > http://freeipa.com/page/Windows_authentication_against_FreeIPA>
> > > >>
> > > >> And all seems to be working fine. After I run klist I see valid
> > tickets:
> > > >>
> > > >> Microsoft Windows [Version 6.1.7601]
> > > >> Copyright (c) 2009 Microsoft Corporation. Alle Rechte vorbehalten.
> > > >>
> > > >> C:\Users\fh>klist
> > > >>
> > > >> Aktuelle Anmelde-ID ist 0:0x153b25
> > > >>
> > > >> Zwischengespeicherte Tickets: (1)
> > > >>
> > > >> #0>     Client: fh @ REALM
> > > >>          Server: krbtgt/REALM @ REALM
> > > >>          KerbTicket (Verschlüsselungstyp): AES-256-CTS-HMAC-SHA1-96
> > > >>          Ticketkennzeichen 0x40e10000 -> forwardable renewable initial
> > > >> pre_authen
> > > >> t name_canonicalize
> > > >>          Startzeit: 1/4/2013 14:03:11 (lokal)
> > > >>          Endzeit:   1/5/2013 14:03:11 (lokal)
> > > >>          Erneuerungszeit: 1/11/2013 14:03:11 (lokal)
> > > >>          Sitzungsschlüsseltyp: AES-256-CTS-HMAC-SHA1-96
> > > >>
> > > >>
> > > >> I can do a passwordless login with the latest putty with kerberos
> > > >> authentication,  I disabled password and key logins. And then on the
> > > >> host I checked klist and got this:
> > > >>
> > > >> [fh at test-server-ipa ~]$ klist
> > > >> klist: No credentials cache found (ticket cache
> > > >> FILE:/tmp/krb5cc_1554800011)
> > > >>
> > > >> sudo also doesn't work. To test the setup I did the same from linux
> > host
> > > >> and login in, sudo, klist etc etc all work fine. So I checked the sshd
> > > >> -d output difference and the only difference I see is:
> > > >>
> > > >> -Postponed gssapi-with-mic for fh from 192.168.2.73 port 50334 ssh2
> > > >> -debug1: Received some client credentials
> > > >> +Postponed gssapi-with-mic for fh from 192.168.2.56 port 49168 ssh2
> > > >> +debug1: Got no client credentials
> > > >>
> > > >> Where .73 is the linux host and .56 is the windows host.
> > > >>
> > > >> What am I missing here?
> > > >>
> > > >
> > > > The problem isn't that authentication fails, it is that the credentials
> > > > aren't forwarded, right?
> > > >
> > > > Does putty support this?
> > > >
> > > > rob
> > > >
> > > >
> > >
> > >
> > > --
> > >
> > >
> > >
> > > # Han
> >
> > > _______________________________________________
> > > Freeipa-users mailing list
> > > Freeipa-users at redhat.com
> > > https://www.redhat.com/mailman/listinfo/freeipa-users
> >
> > _______________________________________________
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> > Freeipa-users at redhat.com
> > https://www.redhat.com/mailman/listinfo/freeipa-users
> >
> 
> 
> 
> -- 
> 
> 
> 
> # Han