Virtual list view problem
by Venish Khant
Hi all
I am using cpan Net::LDAP module to access LDAP entries. I want to
search LDAP entries using Net::LDAP search method. When I do search, I
want some limited number of entries from search result, for
this(searching) process I am using Net::LDAP::Control::VLV module. But
I get error on VLV response control. Please, any one have idea about
this error.
*
Error:* Died at vlv.pl line 50,
This is my example. I changed the font style of line 50
#!/usr/bin/perl -w
use Net::LDAP;
use Net::LDAP::Control::VLV;
use Net::LDAP::Constant qw( LDAP_CONTROL_VLVRESPONSE );
use Net::LDAP::Control::Sort;
sub procentry {
my ( $mesg, $entry) = @_;
# Return if there is no entry to process
if ( !defined($entry) ) {
return;
}
print "dn: " . $entry->dn() . "\n";
@attrs = $entry->attributes();
foreach $attr (@attrs) {
#printf("\t%s: %s\n", $attr, $entry->get_value($attr));
$attrvalue = $entry->get_value($attr,asref=>1);
#print $attr.":". $entry->get_value($attr)."\n";
foreach $value(@$attrvalue) {
print "$attr: $value\n";
}
}
$mesg->pop_entry;
print "\n";
}
$ldap = Net::LDAP->new( "localhost" );
# Get the first 20 entries
$vlv = Net::LDAP::Control::VLV->new(
before => 0, # No entries from before target entry
after => 19, # 19 entries after target entry
content => 0, # List size unknown
offset => 1, # Target entry is the first
);
my $sort = Net::LDAP::Control::Sort->new( order => 'cn' );
@args = ( base => "dc=example,dc=co,dc=in",
scope => "subtree",
filter => "(objectClass=inetOrgPerson)",
callback => \&procentry, # Call this sub for each entry
control => [ $sort, $vlv ],
);
$mesg = $ldap->search( @args );
# Get VLV response control
*($resp) = $mesg->control( LDAP_CONTROL_VLVRESPONSE ) or die;*
$vlv->response( $resp );
# Set the control to get the last 20 entries
$vlv->end;
$mesg = $ldap->search( @args );
# Get VLV response control
($resp) = $mesg->control( LDAP_CONTROL_VLVRESPONSE ) or die;
$vlv->response( $resp );
# Now get the previous page
$vlv->scroll_page( -1 );
$mesg = $ldap->search( @args );
# Get VLV response control
($resp) = $mes
# Now page with first entry starting with "B" in the middle
$vlv->before(9); # Change page to show 9 before
$vlv->after(10); # Change page to show 10 after
$vlv->assert("B"); # assert "B"
$mesg = $ldap->search( @args );g->control( LDAP_CONTROL_VLVRESPONSE ) or
die;
$vlv->response( $resp );
--
Venish Khant
www.deeproot.co.in
7 years, 6 months
OpenLDAP and dynalogin (two-factor auth with HOTP)
by Daniel Pocock
Some time ago I created the dynalogin ( http://www.dynalogin.org )
solution for two-factor authentication.
I'm just contemplating how to make it easier to integrate, and making it
convenient to use with OpenLDAP seems like a good strategy: can anyone
comment on that?
The initial thoughts that I have about the subject:
- SASL based solution (dynalogin has digest capability already, so it
could be adapted for SASL PLAIN or DIGEST-MD5)
- should not prevent password logins (user should be able to use either
password or HOTP code)
- should enable people to use it indirectly (e.g. if someone already has
pam_ldap working, they should be able to add dynalogin to their OpenLDAP
server and get immediate benefit)
- use cases: UNIX login, high-security webmail login, VPN and OpenID
provider backed by OpenLDAP
I know that SASL already supports OTP, but that is not HOTP, it is OPIE
(or S/Key) RFC 2289:
http://tools.ietf.org/html/rfc2289
whereas HOTP is RFC 4226:
http://www.ietf.org/rfc/rfc4226.txt
HOTP is considered more secure and more widely implemented.
8 years, 5 months
Getting the list of members in an AD group
by Sankar P
Hi,
I have the SID of an AD group. I want to get the list of members who
belong to that group. All the documentation page that I search for
points me to the reverse only (i.e., getting all the groups membership
information of a user).
Can someone show me to the relevant way to get the users who belong to
a group whose SID I have ?
Thanks.
--
Sankar P
http://psankar.blogspot.com
9 years, 6 months
DIT for an academic institution
by Shali 9846303531
Dear All,
I am new to these LDAP concepts , i have prepared a DIT for our
organization with two academic institutions with each institution having
different branches of study and also there is staff and students . i have
attached the DIT , if am going through a wrong way kindly guide me.
--
Thanks & Regards
Shali.K.R
Server Administrator
9 years, 6 months
Weird DNS round-robin issue
by Dennis Leeuw
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Hi all,
I hope I am on the right list for the problem I am experiencing.
We have two subnets
192.168.196.
192.168.222.
Our main LDAP servers run in 192.168.196. and are load-balanced by
round-robin DNS.
The 192.168.196. network is exhausted, so we added a new LDAP slave to
192.168.222. and added the IP address to the round-robin pool.
But it seems that it is only used by other servers in the 192.168.222
network and not by servers in the 192.168.196. network
This setup has now been running for 6 days, with nscd.conf:
enable-cache hosts yes
positive-time-to-live hosts 3600
negative-time-to-live hosts 20
suggested-size hosts 211
check-files hosts yes
persistent hosts yes
shared hosts yes
max-db-size hosts 33554432
and nslcd.conf:
uid nslcd
gid ldap
uri ldap://ldap.div.ourdomain.nl/
base dc=div,dc=ourdomain,dc=nl
ssl no
tls_cacertdir /etc/openldap/cacerts
The LDAP server in the 192.168.222 range serves only 33 connections
all from the 192.168.222 range, and the 2 hosts in the 192.168.196
range serve 599 and 706 connections. The last 2 servers do serve the
143.121.222. network also. So might there be some caching issue?
$ getent ahost ldap.div.ourdomain.nl
192.168.196.190 STREAM ldap.div.ourdomain.nl
192.168.196.190 DGRAM
192.168.196.190 RAW
192.168.196.151 STREAM
192.168.196.151 DGRAM
192.168.196.151 RAW
192.168.222.179 STREAM
192.168.222.179 DGRAM
192.168.222.179 RAW
Is this the right list for this question? And if so can someone help
me understand what is going on?
With kind regards,
Dennis Leeuw
- --
ICT Medewerker
Divisie Biomedische Genetica
UMC Utrecht
Heidelberglaan 100 STR2.126
3584 CX Utrecht
The Netherlands
06 27744048
intern: 64048
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9 years, 6 months
Re: Have you seen this FUD - IT pros suffer OpenLDAP configuration headaches ?
by Turbo Fredriksson
[Sorry Howard for sending it to you personally. It was meant for the list.
I sent a copy to the list as well. I hope you don't mind if I send this reply
to the list. I've included every word, so not to take something out of
context.]
On Jan 30, 2014, at 6:17 PM, Howard Chu wrote:
>> Personally, I think it's spot on. It IS hard to configure an LDAP server, and
>> even harder to understand how it works (the object based part). Took me three
>> months first time, and I'm not an idiot.
>
> The object based part is *LDAP*, so that complaint is not specific to OpenLDAP.
Indeed.
But setting up something like Active Directory is something my aunt can/could
do. It probably won't scale to thousands (or maybe not even hundreds :) of
users, but it can be done with reasonable ease.
> The part about RedHat seems fairly accurate to me, it *is* true that they have their own commercial LDAP server to sell, and they have no great interest in OpenLDAP working well on their platforms.
>
>> Even today, I need to consult either my own book or the howto (or seriously
>> skim through the man pages) to setup a new server.
>
> And I still need to read the docs when configuring an Apache HTTP server. That's why we have manpages, there's nothing wrong about that.
Same here. Not my point (see the part at the bottom)...
>> And even worse if when you want to optimize the backend... There's a lot of
>> magic there....
>
> The LMDB backend has no tuning/optimization. That's one of the reasons it exists today.
Yeah, but isn't it quite slow with lmdb? I haven't tested that in years, so
I don't know. One wouldn't run it in production though?
>> And with the new config backend!? I haven't even had the time or energy to go
>> that far yet!
>>
> I think you (and everyone else) are blowing this way out of proportion. Compare the example from here
I know how it works and I don't really have that much problem with it, it's just
so much more difficult to setup (initially) and then maintain than a simple
text file.
It's way better, but it IS also more complicated (than just fire up an editor,
modify the part you want and then issue a service restart - can't be much
simpler than that)...
> http://www.openldap.org/doc/admin24/slapdconf2.html#Configuration%20Example
>
> to the slapd.conf example
>
> http://www.openldap.org/doc/admin24/slapdconfig.html#Configuration%20File...
>
> They aren't that different, and anyone familiar with slapd.conf and LDIF files should have no trouble mapping concepts from one to the other.
>
> And if you aren't familiar with slapd.conf *and* LDIF then you don't know enough to be an LDAP administrator in the first place, you need to do more homework. That's just life.
I couldn't agree more! I've taken over more than my fair share of badly setup
and maintained OpenLDAP servers to get really pissed at all the ones not having
a clue what they're doing.
It's not just making a config file/backend to allow the server to start, it's
more planning on how the database should look like (where to put what and
what object classes to use and allow), setting up access control etc, etc. The
actually planing of the database (the content) is the most important part, and
it require quite a lot of reading and testing before it's understood properly to
be able to be used to any extent.
But then there's the integration to the rest of the system (pam login and what
not), Kerberos, SASL, etc, etc...
My point wasn't to argue about the validity of how the OpenLDAP server and it's
config file/backend work etc. I fully agree and have no problems with it.
My point was that the website isn't WRONG - it IS hard! Maybe it SHOULD be hard?
The whole concept of an LDAP server is a difficult subject, and shouldn't be
taken lightly.
Unfortunately, it seems that way to many beginners that have been installing
a distribution at home is starting to work as a Linux tech/admin thinking that
just because the've run it at their workstation at home for a couple of months
makes them good enough to work in a professional environment.
I see that in a lot of OpenSource project I'm part of. Complete noobs want to
use something complicated that require quite a lot of homework. And then comes
complaining when things go south! Or even worse, they bad mouth the project or
the technology!
(Open)LDAP is one of those many things that require a lot more from the admin
than say ... installing a mail server locally...
On Debian GNU/Linux that's practically automatic. Just answer a couple of
questions, and it works...
It's sad that the website in question (and from what one could take from this -
that people 'out there') actually thinks that this should be easy. But it's not
(technically) wrong...
--
There are no dumb questions,
unless a customer is asking them.
- Unknown
9 years, 6 months
LDAP_OPT_X_TLS_CACERTDIR not working.
by Seshadri, Anitha
Hi,
I would like to open a discussion with OpenLDAP team. I hope this is the right email address. If not please let me know the correct to which this mail should be directed to.
Issue:
We are currently using OpenLdap 2.4.16 version on Win 64 .We are using RSA and MES Shareadapter internally to build the openldap libs.
I am getting the below error when I use Sha-256 (2048 key length) certificates:
ldap_sasl_bind_s: Can't contact LDAP server (-1) error:14090086:SSL routines: SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
I am using the option LDAP_OPT_X_TLS_CACERTDIR and pass the cert directory which has the certificates. This fails.
But the same passes when I use LDAP_OPT_X_TLS_CACERTFILE and point to the certicate which is of .pem format.
Can you please let me know I am missing something here or is this a bug?
Any help on this is appreciated.
Thanks
Anitha
9 years, 6 months
Moving From Debian 2.4.31/hdb to LTB 2.4.39/mdb
by Andy Dorman
Hi. We have been using OpenLDAP for about 11 years now and have an MMR
set up with 2 masters and 18 delta-syncrepl clients/slaves, all but 3
slaves are currently using back_hdb. Our beta test server and two load
balancers are using back_mdb. The db is not too big with about 50,000
entries, 9 indexes (7 eq & 2 sub) and the slapdump ldif is about 41 MB.
All our servers are Debian "testing" with a few packages from unstable
and even experimental so we have the latest security and feature fixes
for the work we do (email security filtering). Unfortunately, even the
"bleeding edge" debian releases are waaaay behind in OpenLDAP.
Last year we lost our system admin that set all this up, and I have been
on a very steep learning curve since then. At this time I believe we
need to move to a current version of OpenLDAP via ltb-project and switch
to mdb, but I have run into a couple of questions we need to resolve first.
FWIW, I would dearly like to help out the Debian community and compile &
maintain an up-to-date version of OpenLDAP for them, but I need at least
a couple more years of experience before it is even marginally safe to
have other companies depending on my expertise with debian packaging.
Anyway, after reading the OpenLDAP & ltb-project docs I have a couple of
questions for anyone already using the ltb-project debian release,
slapd.d & mdb. I hope the answers will help make our and others'
transition go more smoothly.
So here we go....
Question #1. I see that slapd.conf is deprecated and we should move to a
slapd.d config db.
However, the slapd.conf file (with git & cfengine) meets 3 key
requirements for our service's configuration management: (1) audit
trail, (2) peer review & staff notification, (3) automatic, staggered
release to all servers so our users experience 0 downtime.
I do not yet see an "easy" way to meet the first two requirements using
slapd.d.
To satisfy #3 I hope we can just update our master server slapd.d and
config changes will be replicated to the slaves. Someone please correct
me if I am wrong about that.
To meet the requirement for an audit trail & staff review &
notification, in the absence of someone's experience and/or knowledge
from this group, we currently plan to use our ticket-tracking system
(Request Tracker). Within an RT queue dedicated to our db systems we
will document, review & manage slapd.d changes prior to actually making
a change in the master which will then (I hope) propagate through
delta-syncrepl.
How does anyone else that is using slapd.d with an MMR setup with
multiple client/slaves take care of their needs for an audit trail, peer
review/staff notification, and release to all those servers?
Question #2. This may be a simple one....When reading the latest
OpenLDAP docs at http://www.openldap.org/doc/admin24/slapdconf2.html I
noticed that there are no references to back_mdb in the configuration
documentation...Specifically, "Table 5.2: Database Backends" and "Table
6.2: Database Backends" do not show an "mdb" option. Is this an
oversight or is mdb going away already or am I completely confused? I
suspect the answer is #3 ;-)
Basically I need to know what to use in the "backend" & "database"
directives (slapd.conf) or "olcBackend" attribute (slapd.d) if we want
the mdb backend?
Thank you for your insights and any information you can share.
--
Andy Dorman
Ironic Design, Inc.
AnteSpam.com, ComeHome.net
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9 years, 6 months
LDAP account status
by Julien Courtès
Hi,
I want to disable an account without deleting informations about it.
This account is linked with some services such as Owncloud, ftp
authentification, samba, linux auth and ssh auth.
Does it exists a way to disable the account for all the services?
I know that I can disable the account for samba with sambaAcctFlags but
I don't know an easy way for other services.
I thinked to create a new field called "AccountStatus" and filter on
each service accounts which have AccountStatus=active like that
/(&(objectClass=inetOrgPerson)(AccountStatus=active))
/Is it a good way to do it or no?
Thanks
Julien Courtès
9 years, 6 months
deploying password policy module
by Paul B. Henson
We are planning to deploy the password policy module to satisfy our security
groups requirement for account lockouts (a.k.a., intentionally provided DoS
attack vectors <sigh>). I had a couple of questions regarding the deployment
I was hoping someone might be kind enough to answer.
Does the password policy module need to be loaded on all of the servers
simultaneously, even if there are no password policies defined? We typically
stage configuration changes, pulling servers out of the load balancer,
updating them, testing them, and then putting them back, such that at no
time is service unavailable. The password policy module extends the schema
though, and I don't want a server with it loaded potentially trying to
replicate unknown attributes to one without it loaded. It's not clear
whether simply loading the module would potentially cause this, or if
password policy attributes would only be replicated if the module was
actually configured with a default policy or if a user had a specifically
defined policy. So, would it be safe to stage the initial configuration
change loading the module as long as no policies are in place or used (until
all of the servers have been updated), or is it required to shut down all of
the servers simultaneously to make the change?
We are only planning to avail of account lockouts, not any of the other
functionality of the module. As such, unless I misunderstand, the following
policy should enable lockouts but not apply any of the other restrictions:
dn: cn=default,ou=policies,dc=example,dc=com
cn: default
objectClass: pwdPolicy
pwdAttribute: userPassword
pwdLockout: TRUE
pwdLockoutDuration: 1800
pwdMaxFailure: 100
pwdFailureCountInterval: 300
This would be the default policy. We also have some number of service
accounts which we would not want subject to lockouts, if I understand
correctly, configuring those accounts with an explicit password policy
pwdPolicySubentry like this:
dn: cn=serviceaccount,ou=policies,dc=example,dc=com
cn: default
objectClass: pwdPolicy
pwdAttribute: userPassword
Should leave them with no restrictions?
Finally, there is a requirement for the helpdesk to be able to manually
unlock a locked out account. For an account that is currently locked out,
would deleting the pwdAccountLockedTime and pwdFailureTime attributes reset
it to a normal state?
Thanks much.
9 years, 6 months
