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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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pam_opendirectory(8)					    BSD System Manager's Manual 				      pam_opendirectory(8)

NAME
pam_opendirectory -- OpenDirectory PAM module SYNOPSIS
[service-name] function-class control-flag pam_opendirectory [options] DESCRIPTION
The OpenDirectory PAM module supports the authentication, account management and password management function classes. In terms of the function-class parameter, these are ``auth'', ``account'' and ``password'' respectively. The OpenDirectory Authentication Module The OpenDirectory authentication module permits or denies users based on OpenDirectory password authentication. The following option may be passed to this authentication module: nullok Allow null passwords. The OpenDirectory Account Management Module The OpenDirectory account management module permits or denies users based whether the account is enabled in OpenDirectory. The following option may be passed to this account management module: no_check_shell Skip validating the user's shell. no_check_home Skip validating the user's home directory. refresh=min Sets the mbr_check_membership(3) cache timeout to min minutes. When this option is used, the min value must be specified, and it must be an integer. The OpenDirectory Password Management Module The OpenDirectory password management module supports password changing and enforces the OpenDirectory password policy. SEE ALSO
mbr_check_membership(3), pam.conf(5), pam(8), pwpolicy(8), DirectoryService(8) BSD
February 7, 2009 BSD
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