[Freeipa-users] IPA Compat + ID Views + AIX 7.1

Fri May 12 14:03:05 UTC 2017

Yes, kinit works with IPA users. GSSAPI authentication is not keeping it simple, since we want passwords to work before trying TGS based logins over GSSAPI.
The keytab works sinds lsuser is still able to get user data. (Documentation specifies that enabling krb5 in ldap.cfg makes the bind user and password moot, secldapclntd uses krb5 to identify itself to IPA)

Also we are able to kinit host/aixlpar.example.org at EXAMPLE.ORG<mailto:host/aixlpar.example.org at EXAMPLE.ORG> -kt /etc/krb5/krb5.keytab

We van try using su from an unprivileged user, but su has some different issues altogether, it doesn’t like @ in usernames which we need at the next stage (integrating AD Trust)

From: Iulian Roman [mailto:iulian.roman at gmail.com]
Sent: vrijdag 12 mei 2017 15:56
To: Hummelink, Wouter
Cc: luiz.vianna at tivit.com.br; freeipa-users at redhat.com
Subject: Re: [Freeipa-users] IPA Compat + ID Views + AIX 7.1

On Fri, May 12, 2017 at 3:31 PM, <wouter.hummelink at kpn.com<mailto:wouter.hummelink at kpn.com>> wrote:
The shell is shown correctly as ksh in lsuser, so that doesnt appear to be an issue for the ID view.

My advice would be to start simple ,prove that your authentication works and you can develop a more elaborated setup afterwards. If you combine them all together it will be a trial and error which eventually will work at some point.
Do you have the correct keytabs in /etc/krb5/krb5.keytab ? can you run kinit (with password and with the keytab) from aix and get a ticket from Kerberos ? can you su to an IPA account ? do you have GSSAPIAuthentication enabled in sshd_config  ?
From what you've described i would suspect that your keytab is not correct , but that should be confirmed only by answering the questions above.

Verzonden vanaf mijn Samsung-apparaat

-------- Oorspronkelijk bericht --------
Van: Luiz Fernando Vianna da Silva <luiz.vianna at tivit.com.br<mailto:luiz.vianna at tivit.com.br>>
Datum: 12-05-17 15:03 (GMT+01:00)
Aan: "Hummelink, Wouter" <wouter.hummelink at kpn.com<mailto:wouter.hummelink at kpn.com>>, freeipa-users at redhat.com<mailto:freeipa-users at redhat.com>
Onderwerp: Re: [Freeipa-users] IPA Compat + ID Views + AIX 7.1

Hello Wouter.

It may seem silly, but try installing bash on one AIX server and test authenticating against that one.

Its a single rpm with no dependencies. For me it did the trick and I ended up doing that on all my AIX servers.

Let me know how it goes or if you have any issues.
Best Regards
__________________________________________
Luiz Fernando Vianna da Silva

Em 12-05-2017 09:47, wouter.hummelink at kpn.com<mailto:wouter.hummelink at kpn.com> escreveu:
Hi All,

We’re running a POC to integrate IPA and AIX using AIX KRB5LDAP compound module.
All the moving parts seem to be working on their own, however logging in doesn’t work with SSH on AIX reporting Failed password for user <xxx>

We’re using ID views to overwrite the user shell and home dirs. (Since AIX will refuse a login with a nonexisting shell (like bash))
AIXs lsuser command is able to find all of the users it’s supposed to and su to IPA users works.
Also when a user tries to log in I can see a successful Kerberos conversation to our IPA server.

Tips for troubleshooting would be much appreciated, increasing SSH log level did not produce any meaningful logging.

=============== Configuration Excerpt ================================================================
/etc/security/ldap/ldap.cfg:
ldapservers:ipaserver.example.org<http://ipaserver.example.org>
binddn:uid=srvc-aixservice,cn=users,cn=accounts,dc=example,dc=org
bindpwd:{DESv2}<redacted>
authtype:ldap_auth
useSSL:TLS
ldapsslkeyf:/etc/security/ldap/example.kdb
ldapsslkeypwd:{DESv2}4688216124E33174C03FBBB420 88FA8 932F219867AA7C2C552A12BEEC0CC67
useKRB5:yes
krbprincipal:host/aixlpar.example.org<http://aixlpar.example.org>
krbkeypath:/etc/krb5/krb5.keytab
userattrmappath:/etc/security/ldap/2307user.map
groupattrmappath:/etc/security/ldap/2307group.map
userbasedn:cn=users,cn=aixtest,cn=views,cn=compat,dc=example,dc=org
groupbasedn:cn=groups,cn=aixtest,cn=views,cn=compat,dc=example,dc=org
netgroupbasedn:cn=ng,cn=compat,dc=example,dc=org
automountbasedn:cn=default,cn=automount,dc=example,dc=org
etherbasedn:cn=computers,cn=accounts,dc=example,dc=org
userclasses:posixaccount,account,shadowaccount
groupclasses:posixgroup
ldapport:389
searchmode:ALL
defaultentrylocation:LDAP

/etc/security/user default:
SYSTEM = KRB5LDAP or compat
/etc/methods.cfg

LDAP:

       program = /usr/lib/security/LDAP

       program_64 =/usr/lib/security/LDAP64

NIS:

       program = /usr/lib/security/NIS

       program_64 = /usr/lib/security/NIS_64

DCE:

       program = /usr/lib/security/DCE

KRB5:

       program = /usr/lib/security/KRB5

       program_64 = /usr/lib/security/KRB5_64

       options = authonly,is_kadmind_compat=no,tgt_verify=yes,kadmind=no,keep_creds=yes,allow_expired_pwd=no

KRB5LDAP:

       options = auth=KRB5,db=LDAP

Met vriendelijke groet,
Wouter Hummelink
Technical Consultant - Enterprise Webhosting / Tooling & Automation
T: +31-6-12882447<tel:+31%206%2012882447>
E: wouter.hummelink at kpn.com<mailto:wouter.hummelink at kpn.com>

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