[Date Prev][Date Next]
Re: Limiting finger lookup access on Linux
running ldapsearch they'd need to authenticate with their own
credentials, and with their own credentials, they can't search the
entire ldap tree. the proxy user defined in /etc/ldap.conf can
search the entire tree.
I have limited which of our LDAP users can connect to the machine
using a pam_groupdn defined in /etc/ldap.conf. No one has physical
access to the machine, it is virtual ;) I mean users that have shell
access via sshd.
Doesn't the proxy user defined in /etc/ldap.conf need access to search
for users and figure out their DN's to authenticate them and to check
FYI this is CentOS release 5.3 and my openldap servers are still
running openldap 2.3.36.
thanks for your response, sorry I wasn't completely clear.
On Sep 11, 2009, at 11:23 AM, Hallvard B Furuseth wrote:
Rex Roof writes:
I have some linux machines that I have configured for student access.
We are authenticating against our OpenLDAP tree and limiting which
users have access via an LDAP groupOfNames. This is all working
This is the problem I am having. Any user with access to the system
can run the /usr/bin/finger command and do a name search against our
entire LDAP tree. I would like to limit the info available via
finger to just the users that have access to any particular machine.
How can this be controlled?
I don't quite get this. If they can run /usr/bin/finger, can't they
also run /usr/bin/ldapsearch - or if that is missing, an ldapsearch
they've installed somewhere else?
With "access to the system" do you mean someone who can log in, or
physical access to a system which allows anyone to run finger without
The server doesn't know it is finger which is doing the search, but
can use access controls to limit searches to certain hosts, or only
authenticated users, or whatever. You don't need to provide anonymous
read access if all you need is authentication, so maybe you can turn
such search altogether. Also you can use the unchecked and size
to ensure people can't just search for *, they must at least provide a
match which narrows down the search well.