Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-06 Thread Ondrej Valousek
Exactly! That was the biggest advantage of Centrify/Likewise/rest, but hopefully with the latest set of RFEs I have submitted against sssd, 
it will no longer be any advantage.


On 10/05/2011 10:18 PM, Steven Jones wrote:

...the biggest thing for me so far is the ease of use, which with our limited 
capability staff/useradmins has to be a god send.



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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-05 Thread Ondrej Valousek

Submitted RFEs #743503,#743505,#743505 and #743509 into RedHat bugzilla (I have 
no login to fedorahosted.org so I could not submit to upstream).
Take them as a wish-list only and feel free to close them if they do not fit 
into the IPA roadmap.

Thanks!
Ondrej

On 10/04/2011 04:47 PM, Stephen Gallagher wrote:

These are all great ideas, Ondrej. Would you mind opening RFE bugs for
them? You can file them upstream at https://fedorahosted.org/sssd or in
Red Hat Bugzilla https://bugzilla.redhat.com in the sssd component.

On Tue, 2011-10-04 at 16:29 +0200, Ondrej Valousek wrote:

Can you provide more information here? We DO have support for automatic
detection based on DNS SRV records. Does a DC locator use some other
mechanism?


Example AD domain CONTOSO.COM used on 3 sites - Prague,Cork, Dublin.
I have machine in Prague and I want it to join CONTOSO.COM. Now if I
used:

dns_discovery_domain = contoso.com

sssd would try to connect to any DC in the domain - even the one in
Dublin, completely ignoring sites.
I have to use:

dns_discovery_domain = Prague._sites.contoso.com

To force it to use Prague DCs only.
My understanding is, that the DC locator tries to communicate with
DC's first to determine local site and remote DC's are only used if no
valid/working DC can be found in the local site (Prague in this case).


I'm not sure what you mean by this? Do you mean you don't want to have
to specify ldap_schema = rfc2307bis and have it instead auto-detected?

That's trickier than it sounds.


well this is a really small one. I would say it would be perfectly
sufficient to introduce something like:

ldap_schema=msrfc2307bis

which would be equivalent to:

ldap_user_object_class = user
ldap_group_object_class = group
ldap_user_home_directory = unixHomeDirectory
ldap_schema = rfc2307bis

also, the ldap bind mechanism negotiation could be potentially
improved, now I have to explicitly specify

ldap_sasl_mech = GSSAPI

otherwise sssd tries to use SASL/EXTERNAL which fails when
communicating to AD controllers.


What features of the krb5 library do you mean? SSSD provides a locator
plugin that manages several features of the krb5 library, including
kinit and kpasswd.


The thing is that not all Linux apps are using sssd so we have to
remember to configure /etc/krb5.conf. too.
When using Centrify, all I need to do is:

# adjoin contoso.com

..which takes care of everything - /etc/nsswitch.conf, krb5.conf, PAM
modules, eeeverything. If I wanted to use sssd for the same job I have
to:

1. configure (manually) /etc/samba/smb.conf
2. net ads join (- just to get machine creds)
3. configure (manually) sssd.conf
4. configure (manually) PAM modules
5. configure (manually) krb5.conf

I understand that much of this is probably not sssd duty, but it would
be helpful to have some script around which would do the same job.


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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-05 Thread Dmitri Pal
On 10/05/2011 04:02 AM, Ondrej Valousek wrote:
 Submitted RFEs #743503,#743505,#743505 and #743509 into RedHat
 bugzilla (I have no login to fedorahosted.org so I could not submit to
 upstream).
 Take them as a wish-list only and feel free to close them if they do
 not fit into the IPA roadmap.

Thank you for taking time and doing this!


 Thanks!
 Ondrej

 On 10/04/2011 04:47 PM, Stephen Gallagher wrote:
 These are all great ideas, Ondrej. Would you mind opening RFE bugs for
 them? You can file them upstream at https://fedorahosted.org/sssd or in
 Red Hat Bugzilla https://bugzilla.redhat.com in the sssd component.

 On Tue, 2011-10-04 at 16:29 +0200, Ondrej Valousek wrote:
 Can you provide more information here? We DO have support for automatic
 detection based on DNS SRV records. Does a DC locator use some other
 mechanism?

 Example AD domain CONTOSO.COM used on 3 sites - Prague,Cork, Dublin.
 I have machine in Prague and I want it to join CONTOSO.COM. Now if I
 used:

 dns_discovery_domain = contoso.com

 sssd would try to connect to any DC in the domain - even the one in
 Dublin, completely ignoring sites.
 I have to use:

 dns_discovery_domain = Prague._sites.contoso.com

 To force it to use Prague DCs only.
 My understanding is, that the DC locator tries to communicate with
 DC's first to determine local site and remote DC's are only used if no
 valid/working DC can be found in the local site (Prague in this case).

 I'm not sure what you mean by this? Do you mean you don't want to have
 to specify ldap_schema = rfc2307bis and have it instead auto-detected?

 That's trickier than it sounds.

 well this is a really small one. I would say it would be perfectly
 sufficient to introduce something like:

 ldap_schema=msrfc2307bis 

 which would be equivalent to:

 ldap_user_object_class = user
 ldap_group_object_class = group
 ldap_user_home_directory = unixHomeDirectory
 ldap_schema = rfc2307bis

 also, the ldap bind mechanism negotiation could be potentially
 improved, now I have to explicitly specify

 ldap_sasl_mech = GSSAPI

 otherwise sssd tries to use SASL/EXTERNAL which fails when
 communicating to AD controllers.

 What features of the krb5 library do you mean? SSSD provides a locator
 plugin that manages several features of the krb5 library, including
 kinit and kpasswd.

 The thing is that not all Linux apps are using sssd so we have to
 remember to configure /etc/krb5.conf. too.
 When using Centrify, all I need to do is:

 # adjoin contoso.com

 ..which takes care of everything - /etc/nsswitch.conf, krb5.conf, PAM
 modules, eeeverything. If I wanted to use sssd for the same job I have
 to:

 1. configure (manually) /etc/samba/smb.conf
 2. net ads join (- just to get machine creds)
 3. configure (manually) sssd.conf
 4. configure (manually) PAM modules
 5. configure (manually) krb5.conf

 I understand that much of this is probably not sssd duty, but it would
 be helpful to have some script around which would do the same job.


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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-04 Thread Ondrej Valousek

I have ~50 servers and yes, we are using Centrify now - and yes, it is pain in 
the ass (need to take care of the licenses).
But I have found out recently that sssd can do much of the Centrify's duty (authorization  authentication) - well, it is not so polished, 
but it seems to work well.


Ondrej

On 10/03/2011 10:51 PM, Steven Jones wrote:

I have 200+servers and 250 linux desktops and growing.cant manage those 
with local access with 1.5 adminsyou also cant manage them with AD unless 
you buy centrify/likewise or quest software or similar and thats very expensive 
and a pain in the ass.




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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-04 Thread Stephen Gallagher
On Tue, 2011-10-04 at 09:32 +0200, Ondrej Valousek wrote:
 I have ~50 servers and yes, we are using Centrify now - and yes, it is
 pain in the ass (need to take care of the licenses).
 But I have found out recently that sssd can do much of the Centrify's
 duty (authorization  authentication) - well, it is not so polished,
 but it seems to work well.

As the lead SSSD developer, I can't help but chime in here and ask what
polish you'd like to see :)

RFEs and bugs can be filed upstream at https://fedorahosted.org/sssd
(Requires a Fedora account, you can get one at
https://admin.fedoraproject.org/accounts) 


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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-04 Thread Ondrej Valousek
Well, small things like sssd can not renew machine credentials / sssd can not detect local site automatically in AD domain (no DC locator 
implemented) / sssd can not detect/guess AD schema automatically / sssd won't configure the krb5 library for me.

Support for group policies  central management  auditing (Centrify nicely 
fills the OperatingSystem attribute for me) would be also nice.

Most of this is understandable as much of these requests are either AD-specific (hard to blame sssd here) or a RFE is already opened for 
such a functionality.


Anyway, it is still a way better than the classic libnss_ldap.so. :-)
Ondrej

On 10/04/2011 02:09 PM, Stephen Gallagher wrote:

As the lead SSSD developer, I can't help but chime in here and ask what
polish you'd like to see:)




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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-04 Thread Jan Zelený
 Well, small things like sssd can not renew machine credentials

Something like this is already registered as a bachelor's thesis and it should 
be done by the end of May. If you have any special requests or you want to 
know some details, write me a private email, I consult with the student on a 
regular basis.

Jan

 / sssd can
 not detect local site automatically in AD domain (no DC locator
 implemented) / sssd can not detect/guess AD schema automatically / sssd
 won't configure the krb5 library for me. Support for group policies 
 central management  auditing (Centrify nicely fills the OperatingSystem
 attribute for me) would be also nice.
 
 Most of this is understandable as much of these requests are either
 AD-specific (hard to blame sssd here) or a RFE is already opened for such
 a functionality.
 
 Anyway, it is still a way better than the classic libnss_ldap.so. :-)
 Ondrej
 
 On 10/04/2011 02:09 PM, Stephen Gallagher wrote:
  As the lead SSSD developer, I can't help but chime in here and ask what
  polish you'd like to see:)
 
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 Dublin 18


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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-04 Thread Stephen Gallagher
On Tue, 2011-10-04 at 14:53 +0200, Ondrej Valousek wrote:
 Well, small things like sssd can not renew machine credentials /

As Jan said, this is being looked into.

  sssd can not detect local site automatically in AD domain (no DC
 locator implemented) /

Can you provide more information here? We DO have support for automatic
detection based on DNS SRV records. Does a DC locator use some other
mechanism?

 sssd can not detect/guess AD schema automatically

I'm not sure what you mean by this? Do you mean you don't want to have
to specify ldap_schema = rfc2307bis and have it instead auto-detected?

That's trickier than it sounds.

 / sssd won't configure the krb5 library for me.

What features of the krb5 library do you mean? SSSD provides a locator
plugin that manages several features of the krb5 library, including
kinit and kpasswd.

 Support for group policies  central management  auditing (Centrify
 nicely fills the OperatingSystem attribute for me) would be also nice.
 

These are on our long-term roadmap.

 Most of this is understandable as much of these requests are either
 AD-specific (hard to blame sssd here) or a RFE is already opened for
 such a functionality.
 
 Anyway, it is still a way better than the classic libnss_ldap.so. :-) 

That is certainly our goal :)


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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-04 Thread Jan Zelený
 On Tue, 2011-10-04 at 14:53 +0200, Ondrej Valousek wrote:
  Well, small things like sssd can not renew machine credentials /
 
 As Jan said, this is being looked into.
 
   sssd can not detect local site automatically in AD domain (no DC
  
  locator implemented) /
 
 Can you provide more information here? We DO have support for automatic
 detection based on DNS SRV records. Does a DC locator use some other
 mechanism?
 
  sssd can not detect/guess AD schema automatically
 
 I'm not sure what you mean by this? Do you mean you don't want to have
 to specify ldap_schema = rfc2307bis and have it instead auto-detected?
 
 That's trickier than it sounds.
 
  / sssd won't configure the krb5 library for me.
 
 What features of the krb5 library do you mean? SSSD provides a locator
 plugin that manages several features of the krb5 library, including
 kinit and kpasswd.

Also some more are already scheduled for 1.8 release. See tickets 997-1001

  Support for group policies  central management  auditing (Centrify
  nicely fills the OperatingSystem attribute for me) would be also nice.
 
 These are on our long-term roadmap.
 
  Most of this is understandable as much of these requests are either
  AD-specific (hard to blame sssd here) or a RFE is already opened for
  such a functionality.
  
  Anyway, it is still a way better than the classic libnss_ldap.so. :-)
 
 That is certainly our goal :)

-- 
Thank you
Jan Zeleny

Red Hat Software Engineer
Brno, Czech Republic


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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-04 Thread Simo Sorce
On Tue, 2011-10-04 at 09:43 -0400, Stephen Gallagher wrote:
   sssd can not detect local site automatically in AD domain (no DC
  locator implemented) /
 
 Can you provide more information here? We DO have support for
 automatic
 detection based on DNS SRV records. Does a DC locator use some other
 mechanism?

Windows domains list all servers in SRV records, but they have a deeper
concept called sites, where admins can tell which subset of
controllers a client should use (local to them). In order to discover
the right site you need to do additoinal CLDAP queries to AD at startup
time to find out what is the site to use and then you can query
site-specific DNS entries to find the list of DCs.

This is more complex than what we have in current SSSD and is
implemented in Samba's Winbind for example.

Simo.
 
-- 
Simo Sorce * Red Hat, Inc * New York

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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-03 Thread Ondrej Valousek
Just wondering why would anyone want to sync freeIPA and AD - both can serve Linux systems fine, so if I already have AD, I no longer 
require IPA.

My 2 cents...

Ondrej

On 09/29/2011 10:35 PM, Steven Jones wrote:

Hi,

In the documentation it says that new accounts in AD are syncd over to freeIPA, so IPA 
sets the UID as it arrives?

What happens if the user is an existing one and has a UID they want to retain, 
does that transfer over and get used?

Also how do you set permissions and groups?  does the new user just go into a default group 
and then you login to freeIPA and set them up? or can you put the GIDs into AD and they get 
transferred and the user put into the right groups automagically?

Looks like I can set this sort of thing how I want in the sync agreement?

regards

Steven Jones

Technical Specialist - Linux RHCE

Victoria University, Wellington, NZ

0064 4 463 6272

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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-03 Thread Christian Horn
On Mon, Oct 03, 2011 at 10:03:12AM +0200, Ondrej Valousek wrote:
 Just wondering why would anyone want to sync freeIPA and AD - both
 can serve Linux systems fine, so if I already have AD, I no longer
 require IPA.

- the error messages of an AD might be strange to deal with for
unix/linux admins

- While I expect Microsoft to test AD patches with Windows clients
I do not expect them to test linux/unix clients.  Resulting in possi-
bility that patches of the AD break the communication to linux/unix
clients.

- Having important infrastructure like idendification/directory services
running on OpenSource software is a good thing, apply all the OpenSource
advantages here like beeing able to audit the code etc.


Christian

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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-03 Thread Ondrej Valousek

Well, I think these advantages won't outweigh the extra complexity of having 
two systems for the same thing.
But it is up to everyone's decision...

Ondrej


- the error messages of an AD might be strange to deal with for
unix/linux admins

- While I expect Microsoft to test AD patches with Windows clients
I do not expect them to test linux/unix clients.  Resulting in possi-
bility that patches of the AD break the communication to linux/unix
clients.

- Having important infrastructure like idendification/directory services
running on OpenSource software is a good thing, apply all the OpenSource
advantages here like beeing able to audit the code etc.


Christian



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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-03 Thread Stephen Gallagher
On Mon, 2011-10-03 at 10:03 +0200, Ondrej Valousek wrote:
 Just wondering why would anyone want to sync freeIPA and AD - both can
 serve Linux systems fine, so if I already have AD, I no longer require
 IPA.
 My 2 cents...


AD can serve Linux systems with a very limited definition of fine. All
support in Active Directory for POSIX compliance is an afterthought to
Microsoft. It exists solely to try and migrate customers from UNIX to
Windows, and really isn't designed for the purpose.

One of the major problems with using AD for Linux support is that it
violates the LDAP and Kerberos standards in several key places, meaning
that the experience on Linux is significantly degraded from that of
Windows machines. For example, in order to support very large group
memberships (1000 members), Active Directory requires the use of a
special LDAP control to retrieve the members list a page at a time in
several LDAP communications. The way it does this is expressly violating
the LDAP protocol standard, which means that without rewriting all
clients on Linux to break the standard in the same way, Linux and UNIX
machines are capable of only seeing the first thousand members of a
group.

Another problem with Active Directory is its limited support for LDAP
authentication. AD expects that all of its clients are Windows machines,
and therefore capable of using Kerberos and/or NTLM for all
authentication. However, some applications (especially Linux-powered web
applications) can only authenticate using LDAP simple bind
authentication. While AD does have some support for this, LDAP auth
breaks completely in the case of expired users (it has no support for a
password-change grace period with LDAP authentication).

Yet further, in many environments, there are two very different
organizations in the IT departments: one group that manages Windows
systems and one that manages Linux/UNIX systems. By having FreeIPA be
capable of acting as a bridge between the two (either by the current
mechanism of user-syncing or by the forthcoming FreeIPA v3 mechanism of
Kerberos trusted realms), it allows IT departments to continue to hire
staff that knows one system well. It's very hard to find people with a
deep knowledge of both systems; people tend to specialize. It's much
better to let your Linux admins work on the Linux machines, rather than
trying to force your MCSEs to learn the intricacies of a LAMP setup.


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Re: [Freeipa-users] Question on AD to freeipa sync

2011-10-03 Thread Simo Sorce
Ondrej,
it depends on your company structure, complexity and goals and
flexibility.

If you join your Linux machines to an AD directory then you are tied
very strictly, administratively and functionally to that directory. 
Given Windows Administration and Linux Administration are very diverse
skills set, and very few admins are capable of doing both with maximum
proficiency on both system we think that splitting your support
organization between the Windows admin and Linux admins is a good thing.

Each group can concentrate on its own tasks w/o too much interference
and less need for coordinating.
Also FreeIPA is targeted at serving Linux machines and has integrated
HBAC, Sudo support and other goodies that are simply missing in the AD
side as they are alien concepts in the Windows world.

Of course small organization were a single admin group controlling both
platfroms may decide having just one directory is the way to go. You
have the freedom to choose.

Simo.

On Mon, 2011-10-03 at 12:45 +0200, Ondrej Valousek wrote:
 Well, I think these advantages won't outweigh the extra complexity of
 having two systems for the same thing. 
 But it is up to everyone's decision...
 
 Ondrej
 
  - the error messages of an AD might be strange to deal with for
  unix/linux admins
  
  - While I expect Microsoft to test AD patches with Windows clients
  I do not expect them to test linux/unix clients.  Resulting in possi-
  bility that patches of the AD break the communication to linux/unix
  clients.
  
  - Having important infrastructure like idendification/directory services
  running on OpenSource software is a good thing, apply all the OpenSource
  advantages here like beeing able to audit the code etc.
  
  
  Christian
 
 
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[Freeipa-users] Question on AD to freeipa sync

2011-09-29 Thread Steven Jones
Hi,

In the documentation it says that new accounts in AD are syncd over to freeIPA, 
so IPA sets the UID as it arrives?

What happens if the user is an existing one and has a UID they want to retain, 
does that transfer over and get used?

Also how do you set permissions and groups?  does the new user just go into a 
default group and then you login to freeIPA and set them up? or can you put the 
GIDs into AD and they get transferred and the user put into the right groups 
automagically?

Looks like I can set this sort of thing how I want in the sync agreement? 

regards

Steven Jones

Technical Specialist - Linux RHCE

Victoria University, Wellington, NZ

0064 4 463 6272

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