LDAP Client configuration for authentication?

[dbs]

I’d like to use my Zeroshell server as an LDAP authentication host, but I can’t seem to get the configuration stable.

Right now ‘finger’ works correctly on an LDAP account, but doing ‘id’ against them (or anything else that requires an actual auth lookup) does not.

I’ve changed /etc/nsswitch.conf to say ‘ldap’ for group and passwd:

passwd:         compat ldap

group:          compat ldap

My ldap.conf has:

base dc=interlude,dc=homeport,dc=org

uri ldap://192.168.1.2:389/

ldap_version 3

bindpw (redacted)

rootbinddn cn=admin,dc=interlude,dc=homeport,dc=org

When trying to do an ‘id’ on an ldap-hosted account, I see in /var/log/auth.log:

nscd: nss_ldap: failed to bind to LDAP server ldap://192.168.1.2:389/: Invalid credentials

What am I doing wrong? I’d like to make my LDAP server on the zeroshell box my definitive authentication mechanism (this is a staging environment for a production setup). Help?

[imported_fulvio]

Use

rootbinddn cn=manager,dc=interlude,dc=homeport,dc=org

or anomymous bind.

Do not forget that Zeroshell uses LDAP only for authorisation. The authentication is managed by Kerberos5 and hence the hash of the password is not stored in LDAP.

Regards
Fulvio

[dbs]

I do apologize for the n00b questions – authentication services are relatively new for me (though I used to admin NIS servers. Weep for me)

@fulvio wrote:

Use
rootbinddn cn=manager,dc=interlude,dc=homeport,dc=org
or anomymous bind.

Hmm, I don’t have a login called ‘manager’. I do have the default ‘admin’ account – that’s what I’ve been using – should I not use that? Also, does this negate the need for ‘bindpw’?

@fulvio wrote:

Do not forget that Zeroshell uses LDAP only for authorisation. The authentication is managed by Kerberos5 and hence the hash of the password is not stored in LDAP.

Alright, I barely know Kerberos, so I need ot learn that. What I understand here is that I must set up a kerberos server/client configuration (get a client key generated, etc), and set up the shared keys – LDAP will be used for authorization (“Yes, there’s a person named bob”), and k5 will be used for authentication (“and they can access this machine.”) ?

Thanks again!

[imported_fulvio]

The manager user shares the password with admin.

Regards
Fulvio

[dbs]

@fulvio wrote:

The manager user shares the password with admin.

Changing the rootbinddn to ‘manager’ allowed it to work – now ‘id’ operations are working, but logins still are not.

Is there a guide to setting up Kerberos to work with Zeroshell?

[yum]

I’d suggest you using Fedora distribution. There is an utility called “authconfig-tui”, which works perfectly. You just have to specify “LDAP” for authorization, “Kerberos” for authentificaton, provide Zeroshell’s IP-address for both services, input LDAP base dn and Kerberos realm based on domain name. No need to edit configuration files by hand.

[dbs]

@yum wrote:

I’d suggest you using Fedora distribution. There is an utility called “authconfig-tui”, which works perfectly. You just have to specify “LDAP” for authorization, “Kerberos” for authentificaton, provide Zeroshell’s IP-address for both services, input LDAP base dn and Kerberos realm based on domain name. No need to edit configuration files by hand.

While I appreciate the information, and I found similar info out on the net, replacing my distribution is not an option just to get this working. I’ll continue working on finding the answers elsewhere.

My goal is to have the Zeroshell box essentially function as an ActiveDirectory server – providing a single authentication / authorization service to a range of client machines (windows, linux, mac, etc). On those boxes, I’ll need to set up services for shell access, http authorization, and SAMBA services.

Any pointers to guides for these services would be helpful, but “replace your OS with this version” is not really an option, thanks.

[imported_fulvio]

For Linux clients you need to configure pam_krb5.so in the PAM configuration files. In any case, several Linux distributions have their tools for automatic authorisation and authentication configuration.

To check if the LDAP is correctly configured to provide user information, use the command:

getent passwd

Regards
Fulvio

[dbs]

@fulvio wrote:

For Linux clients you need to configure pam_krb5.so in the PAM configuration files. In any case, several Linux distributions have their tools for automatic authorisation and authentication configuration.

Okay, I’ll work on this for ubuntu, and let ya’ll know.

@fulvio wrote:

To check if the LDAP is correctly configured to provide user information, use the command:

getent passwd

This just shows my local accounts, no LDAP accounts. (ala, getent passwd shows a list of accounts. getent passwd | grep (a known ldap user) shows nothing.

[imported_fulvio]

You should better configure the file /etc/nsswitch.conf by using the line
passwd: files ldap

Regards
Fulvio

[dbs]

@fulvio wrote:

You should better configure the file /etc/nsswitch.conf by using the line
passwd: files ldap

I’m just getting online now – note the beginning of this thread, I’m using ‘compat ldap’ – is there a difference?

[imported_fulvio]

If you use compat you need to specify +: in the /etc/passwd

[panther]

I don’t know if this helps, but I had to add these three lines to /etc/ldap.conf to get my connection to work for ‘getent passwd’.

ssl no
tls_cacertdir /etc/ssl/certs
pam_password md5

I would also love to figure out why I can’t get Apache to authorize a directory with LDAP from Zeroshell. I’ve done the following:

DAV svn
SVNParentPath /var/svn
SVNListparentPath on
AuthType Basic
AuthBasicProvider ldap
AuthzLDAPAuthoritative on
AuthName “svn-ldap”
AuthUserFile /dev/null
AuthLDAPURL “ldap://zeroshell.local:389/dc=SPG?uid?sub?(objectClass=*)”
AuthLDAPBindDN “cn=manager,dc=SPG”
AuthLDAPBindPassword
AuthLDAPGroupAttributeIsDN on
AuthLDAPGroupAttribute member

SSLRequireSSL
Require valid-user

And all I ever get is invalid credentials. When doing ldapsearch -x, I can log into LDAP as long as I use simple connections without a password. However, I have *never* been able to log in with any of my users or their passwords. What am I doing wrong? The weird thing is, I have another machine that came pre-installed with other software which *does* allow logins, so it must be something I’ve missed. Any ideas?

Thanks,
JH

[yum]

Hi, panther!

Zeroshell doesn’t store passwords in LDAP. It is impossible to authentificate against Zeroshell’s LDAP. I think you can use mod_auth_pam / mod_auth_kerb instead to authentificate againts Zeroshell’s Kerberos.

[imported_fulvio]

You are right. Zeroshell authorise with LDAP and authenticate only with Kerberos5 and RADIUS.

Regards
Fulvio

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