[Freeipa-users] IPA Compat + ID Views + AIX 7.1
Bjarne Blichfeldt
BJB at jndata.dk
Wed May 17 05:29:37 UTC 2017
Thank you for pointing that out.
I should of course have been more specific: native aix sudo does not support ldap and therefore sudorules from ldap, but it is possible
to install a different sudo version with ldap enabled.
Unfortunately, in our case, using external rpm's is not an option.
Regards
Bjarne Blichfeldt.
From: Luiz Fernando Vianna da Silva [mailto:luiz.vianna at tivit.com.br]
Sent: 16. maj 2017 16:43
To: Bjarne Blichfeldt <BJB at jndata.dk>; freeipa-users at redhat.com
Subject: Re: [Freeipa-users] IPA Compat + ID Views + AIX 7.1
As far as I found out, it is not possible to integrate sudo rules from IPA into AIX. sudo on aix does not support that.
You will have to maintain /etc/sudoers by som other means.
Thats where you are mistaken. It is possible to integrate sudo rules into AIX, I've done it and have documented it here: https://www.freeipa.org/page/SUDO_Integration_for_AIX
Give it a try, its a fairly simple procedure.
P.S.
IBM has recently pimped the AIX toolbox RPMs and even implemented it as a YUM server. I haven't tried using these new RPMs yet to see if they work with sudo integration.
If you want to keep it safe, user perzl RPMs as I describe on the documentation. If you want, and I would appreciate it if you would, give the new RPMs from toolbox a go and if it works please update the documentaion, or send me your notes and I'll update it.
Atenciosamente/Best Regards
__________________________________________
Luiz Fernando Vianna da Silva
Em 15-05-2017 02:53, Bjarne Blichfeldt escreveu:
We have a working setup on three aix servers and by comparing our config with yours, I see the following differences:
LDAP:
/etc/security/ldap/ldap.cfg :
userattrmappath:/etc/security/ldap/FreeIPAuser.map
groupattrmappath:/etc/security/ldap/FreeIPAgroup.map
userclasses:posixaccount
/etc/security/ldap/FreeIPAuser.map:
#FreeIPAuser.map file
# https://docs.fedoraproject.org/en-US/Fedora/15/html/FreeIPA_Guide/Configuring_an_IPA_Client_on_AIX.html
keyobjectclass SEC_CHAR posixaccount s
# The following attributes are required by AIX to be functional
username SEC_CHAR uid s
id SEC_INT uidnumber s
pgrp SEC_CHAR gidnumber s
home SEC_CHAR homedirectory s
shell SEC_CHAR loginshell s
gecos SEC_CHAR gecos s
spassword SEC_CHAR userpassword s
lastupdate SEC_INT shadowlastchange s
/etc/security/ldap/FreeIPAgroup.map:
#FreeIPAgroup.map file
# https://docs.fedoraproject.org/en-US/Fedora/15/html/FreeIPA_Guide/Configuring_an_IPA_Client_on_AIX.html
groupname SEC_CHAR cn s
id SEC_INT gidNumber s
users SEC_LIST member m
To test if the ldap is working:
ls-secldapclntd
lsldap -a passwd
lsuser -R LDAP ALL
KERBEROS:
/etc/methods.cfg:
KRB5:
program = /usr/lib/security/KRB5
program_64 = /usr/lib/security/KRB5_64
options = authonly,is_kadmind_compat=no,tgt_verify=no,allow_expired_pwd=yes
Add Kerberos to authorized authentication entities and verify:
chauthent -k5 -std
#Verify
lsauthent
Kerberos 5
Standard Aix
To test:
lsuser -R KRB5LDAP <someuser>
Configure aix to create homedir during login:
/etc/security/login.cfg:
mkhomeatlogin = true
usw:
shells = /bin/sh,/bin/bsh,/bin/csh,/bin/ksh,/bin/tsh,/bin/ksh93,/usr/bin/sh,/usr/bin/bsh,/usr/bin/csh,/usr/bin/ksh,/usr/bin/tsh,/usr/bin/ksh93,/
usr/bin/rksh,/usr/bin/rksh93,/usr/sbin/sliplogin,/usr/sbin/uucp/uucico,/usr/sbin/snappd
maxlogins = 32767
logintimeout = 30
maxroles = 8
auth_type = STD_AUTH
mkhomeatlogin = true
Also remember: user can be locked in AIX so use smitty to unlock user and reset login attempts.
As far as I found out, it is not possible to integrate sudo rules from IPA into AIX. sudo on aix does not support that.
You will have to maintain /etc/sudoers by som other means.
Hope that helps, good luck.
Regards
Bjarne Blichfeldt.
From: wouter.hummelink at kpn.com<mailto:wouter.hummelink at kpn.com> [mailto:wouter.hummelink at kpn.com]
Sent: 12. maj 2017 16:03
To: iulian.roman at gmail.com<mailto:iulian.roman at gmail.com>
Cc: freeipa-users at redhat.com<mailto:freeipa-users at redhat.com>
Subject: Re: [Freeipa-users] IPA Compat + ID Views + AIX 7.1
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<mailto:luiz.vianna at tivit.com.br>; freeipa-users at redhat.com<mailto: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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