ldaps has been deprecated in favour of keeping all communication open only at one port. try to use

ldap://host:389 port 0 enable tls Use above settings based on your client

I am using sssd client with following setting and it works on TLS.

[sssd]

config_file_version = 2

services = nss, pam, sudo

domains = default

[nss]

filter_users = root,ldap,named,avahi,haldaemon,dbus,radiusd,news,nscd,ubuntu

[pam]

pam_verbosity = 3

[domain/default]

ldap_tls_reqcert = allow

auth_provider = ldap

ldap_schema = rfc2307bis

krb5_realm = EXAMPLE.COM

ldap_search_base =

ldap_group_member = uniquemember

id_provider = ldap

sudo_provider = ldap

ldap_sudo_search_base = ou=sudoers,dc=xxxx,dc=xxxx,dc=xxxx

netgroup_provider = ldap

ldap_netgroup_search_base = ou=Netgroup,dc=xxxx,dc=xxxx,dc=xxxx

ldap_id_use_start_tls = True

chpass_provider = ldap

ldap_uri = ldap://host1:389/,ldap://ldap2:389/,ldap://ldap3:389/

ldap_chpass_uri = ldap://host1:389/

cache_credentials = True

entry_cache_timeout = 600

ldap_network_timeout = 3 ldap_access_filter = (&(object)(object))

On Mon, Sep 8, 2014 at 10:58 AM, Vijay Ganesan vijay@thoughtspot.com wrote:

Thanks Ryan for pointing me to the right link. I've configured TLS following those instructions. But I can't seem to connect using ldaps://localhost:636 using Apache Directory Studio client. I get a "Error while opening connection - Cannot connect on the server: Connection refused" error. I can connect fine using ldap://localhost:389. What diagnostics can be run to figure out if TLS is working correctly?

Thanks Vijay

On Sun, Sep 7, 2014 at 3:00 PM, Ryan Tandy ryan@nardis.ca wrote:

...

The Ubuntu server guide has a chapter on setting up OpenLDAP, including a section on configuring TLS. Have you followed it?

https://help.ubuntu.com/12.04/serverguide/openldap-server.html

On 07/09/14 02:20 PM, Vijay Ganesan wrote:

...

2. Added following entries to /usr/share/slapd/slapd.conf:

Are you sure that's the right file? By default Ubuntu 12.04 uses LDAP-based configuration (cn=config) instead of a slapd.conf file; and even if it did, it would usually be found in /etc/ldap/slapd.conf and not in /usr/share.

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• Vijay

Thanks Ryan and Udai. Don't really have to use ldaps. I understand now that the documentation https://help.ubuntu.com/12.04/serverguide/openldap-server.html#openldap-tls is for StartTLS an can use that.

LDAPTLS_CACERT=/etc/ssl/certs/vijay_slapd_cert.pem ldapwhoami -H ldap://localhost -x -ZZ gives: *ldap_start_tls: Connect error (-11)* * additional info: A TLS packet with unexpected length was received.*

with '-d1' I get the following which looks like it can connect but subsequent communication fails:

ldap_url_parse_ext(ldap://localhost) ldap_create ldap_url_parse_ext(ldap://localhost:389/??base) ldap_extended_operation_s ldap_extended_operation ldap_send_initial_request ldap_new_connection 1 1 0 ldap_int_open_connection ldap_connect_to_host: TCP localhost:389 ldap_new_socket: 3 ldap_prepare_socket: 3 ldap_connect_to_host: Trying 127.0.0.1:389 ldap_pvt_connect: fd: 3 tm: -1 async: 0 ldap_open_defconn: successful ldap_send_server_request ber_scanf fmt ({it) ber: ber_scanf fmt ({) ber: ber_flush2: 31 bytes to sd 3 ldap_result ld 0x7f2c70eef160 msgid 1 wait4msg ld 0x7f2c70eef160 msgid 1 (infinite timeout) wait4msg continue ld 0x7f2c70eef160 msgid 1 all 1 ** ld 0x7f2c70eef160 Connections: * host: localhost port: 389 (default) refcnt: 2 status: Connected last used: Mon Sep 8 07:56:01 2014

** ld 0x7f2c70eef160 Outstanding Requests: * msgid 1, origid 1, status InProgress outstanding referrals 0, parent count 0 ld 0x7f2c70eef160 request count 1 (abandoned 0) ** ld 0x7f2c70eef160 Response Queue: Empty ld 0x7f2c70eef160 response count 0 ldap_chkResponseList ld 0x7f2c70eef160 msgid 1 all 1 ldap_chkResponseList returns ld 0x7f2c70eef160 NULL ldap_int_select read1msg: ld 0x7f2c70eef160 msgid 1 all 1 ber_get_next ber_get_next: tag 0x30 len 12 contents: read1msg: ld 0x7f2c70eef160 msgid 1 message type extended-result ber_scanf fmt ({eAA) ber: read1msg: ld 0x7f2c70eef160 0 new referrals read1msg: mark request completed, ld 0x7f2c70eef160 msgid 1 request done: ld 0x7f2c70eef160 msgid 1 res_errno: 0, res_error: <>, res_matched: <> ldap_free_request (origid 1, msgid 1) ldap_parse_extended_result ber_scanf fmt ({eAA) ber: ldap_parse_result ber_scanf fmt ({iAA) ber: ber_scanf fmt (}) ber: ldap_msgfree TLS: can't connect: A TLS packet with unexpected length was received.. ldap_err2string ldap_start_tls: Connect error (-11) additional info: A TLS packet with unexpected length was received. ldap_free_connection 1 1 ldap_send_unbind ber_flush2: 7 bytes to sd 3 ldap_free_connection: actually freed

On Mon, Sep 8, 2014 at 7:13 AM, Ryan Tandy ryan@nardis.ca wrote:

On 07/09/14 10:28 PM, Vijay Ganesan wrote:

...

But I can't seem to connect using ldaps://localhost:636 using Apache Directory Studio client. I get a "Error while opening connection - Cannot connect on the server: Connection refused" error. I can connect fine using ldap://localhost:389.

Like Udai wrote, ldaps is deprecated, and if possible you should use STARTTLS on the LDAP port (389) instead. But if you really need ldaps, then edit /etc/default/slapd, add ldaps:/// to the SLAPD_SERVICES line, and restart slapd.

What diagnostics can be run to figure out if TLS is working correctly?

...

LDAPTLS_CACERT=/path/to/ca.pem ldapwhoami -H ldap://server -x -ZZ

Add '-d1' to see some debugging information, including more detailed info from the TLS library.

Ryan Tandy wrote:

On 07/09/14 10:28 PM, Vijay Ganesan wrote:

...

But I can't seem to connect using ldaps://localhost:636 using Apache Directory Studio client. I get a "Error while opening connection - Cannot connect on the server: Connection refused" error. I can connect fine using ldap://localhost:389.

Like Udai wrote, ldaps is deprecated, and if possible you should use STARTTLS on the LDAP port (389) instead.

LDAPS on separate port was not formally defined in a RFC. But there's nothing wrong using it.

Personally I even prefer LDAPS since you can then make sure that the client has to establish a TLS connection before sending any LDAP PDU.

But if you really need ldaps, then edit /etc/default/slapd, add ldaps:/// to the SLAPD_SERVICES line, and restart slapd.

Yes.

Ciao, Michael.

...

...

Vijay Ganesan vijay@thoughtspot.com schrieb am 08.09.2014 um 03:45 in

Nachricht CAB+CZKA5UqdD2DqEERwMfHxyaB9hVGLyFZiSxDmxj3NuYpw_xw@mail.gmail.com:

Note the in generating the self-signed certificate I use "localhost" as the common name.

Why do you need to proove the identity of localhost? Did you understand what PKI is all about?

On Sun, Sep 7, 2014 at 2:20 PM, Vijay Ganesan vijay@thoughtspot.com wrote:

...

For SSL, I'm trying to install a self-signed certificate to OpenLDAP (version 2.4.28 on Ubuntu 12.04). Followed the following steps: *1. Created server certificate using:* openssl req -newkey rsa:1024 -x509 -nodes -out server.pem -keyout server.pem -days 365 *2. Added following entries to /usr/share/slapd/slapd.conf:* TLSCACertificateFile server.pem TLSCertificateFile server.pem TLSCertificateKeyFile server.pem *3. Restarted openldap:* sudo /etc/init.d/slapd restart *4. Tried to read the certs:* openssl s_client -connect localhost:636 -showcerts This causes the following error: *CONNECTED(00000003)* *140409289410208:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:s23_lib.c:177:* *---* *no peer certificate available* *---* *No client certificate CA names sent* *---* *SSL handshake has read 0 bytes and written 213 bytes* *---* *New, (NONE), Cipher is (NONE)* *Secure Renegotiation IS NOT supported* *Compression: NONE* *Expansion: NONE* *---*

Can someone help with what might be wrong in the setup?

Thanks

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• Vijay

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• Vijay