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Operating Systems OS X (Apple) Mac OS X LDAP client not accepting ssh or console logins (PAM error) Post 302980084 by jlh on Tuesday 23rd of August 2016 03:33:00 PM
Old 08-23-2016
Thanks for responding.

Yes, I tried setting

Code:
PasswordAuthentication yes

and

uncommenting the "#UsePAM yes" line.


I still can't login, but at least the error changed a bit.... that's helpful


Code:
sh-3.2# ssh testuser@localhost
Password:
Password:
Password:
testuser@localhost's password:
Connection closed by ::1



Code:
Aug 23 13:18:51 macbook sshd[935]: error: PAM: permission denied for testuser from localhost via ::1
Aug 23 13:19:05 --- last message repeated 2 times ---
Aug 23 13:19:05 macbook sshd[935]: Failed password for testuser from ::1 port 50341 ssh2
Aug 23 13:19:05 fawkes sshd[935]: fatal: Access denied for user testuser by PAM account configuration [preauth]

So it seems that mac isn't authenticating properly or reading the password properly, but it's getting the other
attributes correct.

This is such a wacky problem.

I'm thinking maybe the issue is with the authentication mechanisms available to yosemite. If I query the directory server
directly from the mac I see the available SASL authentication mechanisms as:


Code:
sh-3.2#  ldapsearch -x -h FQDN_of_server -b  "" -s base "(objectclass=*)" supportedSASLMechanisms
# extended LDIF
#
# LDAPv3
# base <> with scope baseObject
# filter: (objectclass=*)
# requesting: supportedSASLMechanisms
#

#
dn:
supportedSASLMechanisms: EXTERNAL
supportedSASLMechanisms: SCRAM-SHA-1
supportedSASLMechanisms: GSS-SPNEGO
supportedSASLMechanisms: GSSAPI
supportedSASLMechanisms: DIGEST-MD5
supportedSASLMechanisms: CRAM-MD5
supportedSASLMechanisms: LOGIN
supportedSASLMechanisms: PLAIN
supportedSASLMechanisms: ANONYMOUS

# search result
search: 2
result: 0 Success

# numResponses: 2
# numEntries: 1


But the pam files show for sshd:


Code:
pam_krb5.so
pam_ntlm.so
pam_opendirectory.so


I was thinking that I need to add more SASL authentication methods to the system and I *think* that's done by editing
the .plist of the server in /Library/Preferences/OpenDirectory/Configurations/LDAPv3, but I don't think Apple would make
the OS that fussy.

Maybe I'm overthinking this....
 

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LDAP_CONNECT(3) 							 1							   LDAP_CONNECT(3)

ldap_connect - Connect to an LDAP server

SYNOPSIS
resource ldap_connect NULL ([string $hostname], [int $port = 389]) DESCRIPTION
Establishes a connection to a LDAP server on a specified $hostname and $port. PARAMETERS
o $hostname - If you are using OpenLDAP 2.x.x you can specify a URL instead of the hostname. To use LDAP with SSL, compile OpenLDAP 2.x.x with SSL support, configure PHP with SSL, and set this parameter as ldaps://hostname/. o $port - The port to connect to. Not used when using URLs. RETURN VALUES
Returns a positive LDAP link identifier on success, or FALSE on error. When OpenLDAP 2.x.x is used, ldap_connect(3) will always return a resource as it does not actually connect but just initializes the connecting parameters. The actual connect happens with the next calls to ldap_* funcs, usually with ldap_bind(3). If no arguments are specified then the link identifier of the already opened link will be returned. EXAMPLES
Example #1 Example of connecting to LDAP server. <?php // LDAP variables $ldaphost = "ldap.example.com"; // your ldap servers $ldapport = 389; // your ldap server's port number // Connecting to LDAP $ldapconn = ldap_connect($ldaphost, $ldapport) or die("Could not connect to $ldaphost"); ?> Example #2 Example of connecting securely to LDAP server. <?php // make sure your host is the correct one // that you issued your secure certificate to $ldaphost = "ldaps://ldap.example.com/"; // Connecting to LDAP $ldapconn = ldap_connect($ldaphost) or die("Could not connect to {$ldaphost}"); ?> SEE ALSO
ldap_bind(3). PHP Documentation Group LDAP_CONNECT(3)
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