Re: [Fedora-directory-users] How to control the BIND operation using ACI

C.S.R.C.Murthy
2008-05-09T11:44:42Z

Hi Andrey,
   As I first step, according to your  suggestion, I have removed the
default ACIs for anonymous and authenticated users. With this I expected
that squid will not be able to BIND to the directory server as the
default ACI action should be DENY in case there is no matching rule. But
it is able to successfully BIND when I give proper login/password. If I
am not able to deny BIND operation when there are no
anonymous/authenticated ACI, then I will never be able to control BIND
access, I assume. Please clarify.

regards
murthy

Andrey Ivanov wrote:
> Anyway it is better to make the "allow" ACIs, not
"deny" ACIs.
>
> As for your problem, here is what the ACIs should look like (supposing
> that your groups are cn=INTERNET,ou=Groups,dc=example,dc=com and
> cn=EMAIL,ou=Groups,dc=example,dc=com, ip adresses of your squid server
> are 192.168.0.66 and 172.16.191.66, adresses of your email servers
> 192.168.1.100 and 192.168.1.101)
>
> Delete all the default ACIs (for anonymous/authentified users) and
> choose the attributes that you want to expose (attr1,  attr2...)
>
> For INTERNET group :
> aci: (targetattr = "attr1 || attr2")(version 3.0; acl
"Enable
> attributes to read for a certain ip adresses and to authentified
> users";allow (read,search,compare)(((ip="192.168.0.66") or
> (ip="172.16.191.66")) and (groupdn >
"ldap:///cn=INTERNET,ou=Groups,dc=example,dc=com"));)
>
>
> For EMAIL group :
> aci: (targetattr = "attr1 || attr2")(version 3.0; acl
"Enable
> attributes to read for a certain ip adresses and to authentified
> users";allow (read,search,compare)(((ip="192.168.1.100") or
> (ip="192.168.1.101")) and (groupdn >
"ldap:///cn=EMAIL,ou=Groups,dc=example,dc=com"));)
>
> 2008/5/9 C.S.R.C.Murthy <murthy@barc.gov.in>:
>
>> Dear Andrey,
>>   I did not make clear one point here. My exact ACI requirement is like
>> this, I need to deny bind operation when the connecting DN belongs to
>> certain group and the request is coming from certain ip address. How to
do
>> it in ACI?. More specifically we have one INTERNET group and one EMAIL
>> group. If a person is in INTERNET group he will be allowed to
authenticate
>> (BIND) only from squid proxy server  Simillarly if a person belongs to
EMAIL
>> grooup he will be allowed to authenticate (BIND) only from email
server. We
>> are unable to acheive this type of control using ACI. Please help.
>>
>> regards
>> murthy
>>
>> Andrey Ivanov wrote:
>>
>>> You can do it like this, for example :
>>>
>>> ----------------------------------
>>> aci: (targetattr = "uniqueMember || uidNumber || gidNumber ||
>>> homeDirectory ||  loginShell || gecos")(version 3.0; acl
"Enable
>>> attributes to read for certain ip adresses and to authentified
users";
>>> allow (read,search,compare)(((ip="192.168.0.*") or
(ip="172.16.191.*
>>> ") or (ip="192.168.1.15") or
(ip="172.16.126.1")) and
>>> (userdn="ldap:///all"));)
>>> ------------------------------------
>>> Or you can simply use iptables...
>>>
>>>
>>> 2008/5/8 C.S.R.C.Murthy <murthy@barc.gov.in>:
>>>
>>>
>>>> Hello all,
>>>>   Iam using directory server for squid ldap authentication.
Squid takes
>>>> username/password, binds the directory server and if the BIND
operation
>>>> is
>>>> successful it allows the user through proxy. My problem is how
to specify
>>>> an
>>>> ACI so that BIND operation is allowed only from certain IP
address?. ACI
>>>> allows me to restrict READ/SEARCH/WRITE operations but not BIND
>>>> operation.
>>>> Please help.
>>>>
>>>>
>>> --
>>> Fedora-directory-users mailing list
>>> Fedora-directory-users@redhat.com
>>> https://www.redhat.com/mailman/listinfo/fedora-directory-users
>>>
>>>
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