Samba 3.6 on AIX 7.1 - Windows 10 Access to AIX file shares using Active Directory authentication

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Operating Systems AIX Samba 3.6 on AIX 7.1 - Windows 10 Access to AIX file shares using Active Directory authentication
# 8  

I now appear to have a working yum. Now I just need to find space to install samba. This box is so old that space is very limited.

To resolve the dependency issues I removed openssl and libgcc rpms as below. Tried a test using yum install wget and this installed fine pulling down an older version of libgcc.

rpm -e libgcc-9.1.0-1.ppc
rpm -e openssl-1.1.0g-1withsslv2.ppc

# 9  
The gcc version is OS specific. For AIX 7.1 gcc 6.3 should be used, not 9.

I have a couple of 7.1 systems and yum works. I recommend uninstalling gcc-9 (and libs) along with any dependents, and reinstalling with 6.3. Does that work?

Edit: I see you did that already, great Smilie
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# 10  
I have managed to install samba and kerberos and configured smb.conf, krb5.conf and methods.cfg

I ran the following commands to join the Windows Domain from AIX:

1) kinit <username> using my current Windows user name that I log on to the domain with. Initially I had some problems with time synchronisation (scew time was out). To resolve this I configured ntp daemon pointing it to the domain server and I forced a time synchronisation. After this the command worked and I generated a kerberos key.

2) net ads join -U <username> using my current Windows user name that I log on to the domain with.

Both these commands worked so I joined the Windows domain.

At this stage I ran some test commands:

wbinfo --ping-dc - This came back positive as SUCCESS

wbinfo -g - This brings back a list of all domain groups on the domain controller
wbinfo -u - This brings back a list in unix of all the windows user names on the domain controller

Samba appears to be running ok however the folder I'm trying to share on AIX is still not visible when I try and access it via Windows \\unixserver\sharename . No errors it just isn't recognised by windows as a share.

I logged on a Windows machine to see if my Unix machine can be found in Active Directory. I found it listed under computers (its a member of one group - domain users)

I have 2 questions so far:

1) When configuring Kerberos all the guides refer to winbind settings in methods.cfg

There is a reference in this config file to WINBIND and DCE file locations:

        program = /usr/lib/security/WINBIND
        program_64 = /usr/lib/security/WINBIND_64
        program = /usr/lib/security/DCE

When I check my AIX system these files do not exist. I ran a find searching the whole system. /usr/lib/security exists but WINBIND , WINBIND_64 and DCE do not exist. The latest winbind packages have already been installed via yum so I'm on the latest version for AIX 7.1

In /opt/freeware/lib/security there are 2 files and I believe I may need to copy these to /usr/lib/security ?
The question is why dont I have WINBIND or WINBIND_64 on my system and how do I get hold of these? I presume I need methods.cfg to use these WINBIND library files in order for my fileshare to work?
I don't need to authenticate users to login to the unix shell. I just need a group of windows users (from one AD group) to access an AIX fileshare (without a requirement to enter a password) - authenticating using active directory account.

2) Currently I have joined the domain as a regular windows user. This allows me to interrogate Active Directory and list all users and groups. I presume to get this working correctly I will need to join the domain as a Windows user with a higher level of rights (perhaps domain administrator rights?). Can anyone tell me what group the Windows user should be a member of to get file sharing working so a specific AD group of Windows users can access a shared AIX folder authenticating with their windows password (no need to enter one)? I'm guessing my regular Windows user account won't give me what we need.

I've switched logging up to 3 for samba.log to try and give me an idea of why this is failing but if anyone has got this working appreciate any suggestions.
# 11  
So current status is as follows:

kinit <username> - generated me a ticket using my regular Windows login
net ads join -U <username> - Successfully joined me to Windows domain using my regular windows account

wbinfo -g - Is working and brings back all windows AD groups
wbinfo -u - Is working and brings back all windows User accounts

Samba and Winbind are running however still can't find my AIX Samba share from Windows. As I said earlier in my methods.cfg file the reference to WINBIND file does not exist on my system (not sure if this is the cause)

SAMBA LOGS are showing an error "Server exit (NT_STATUS_CONNECTION_DISCONNECTED)". See logs below

[2019/10/17 06:53:28.159395,  3] ../../source3/smbd/server_exit.c:236(exit_server_common)
[2019/10/17 06:53:41.229754,  3] ../../lib/util/access.c:365(allow_access)
  Allowed connection from x.x.x.x
[2019/10/17 06:53:41.230384,  3] ../../source3/smbd/oplock.c:1422(init_oplocks)
  init_oplocks: initializing messages.
[2019/10/17 06:53:41.230491,  3] ../../source3/smbd/process.c:1948(process_smb)
  Transaction 0 of length 73 (0 toread)
[2019/10/17 06:53:41.230550,  3] ../../source3/smbd/process.c:1541(switch_message)
  switch message SMBnegprot (pid 15597596) conn 0x0
[2019/10/17 06:53:41.230697,  3] ../../source3/smbd/negprot.c:636(reply_negprot)
  Requested protocol [NT LM 0.12]
[2019/10/17 06:53:41.230744,  3] ../../source3/smbd/negprot.c:636(reply_negprot)
  Requested protocol [SMB 2.002]
[2019/10/17 06:53:41.230781,  3] ../../source3/smbd/negprot.c:636(reply_negprot)
  Requested protocol [SMB 2.???]
[2019/10/17 06:53:41.231453,  3] ../../source3/smbd/smb2_negprot.c:294(smbd_smb2_request_process_negprot)
  Selected protocol SMB2_FF
[2019/10/17 06:53:48.869858,  3] ../../source3/smbd/server_exit.c:236(exit_server_common)
[2019/10/17 06:53:51.583732,  3] ../../lib/util/access.c:365(allow_access)
  Allowed connection from x.x.x.x
[2019/10/17 06:53:51.584379,  3] ../../source3/smbd/oplock.c:1422(init_oplocks)
  init_oplocks: initializing messages.
[2019/10/17 06:53:51.584486,  3] ../../source3/smbd/process.c:1948(process_smb)
  Transaction 0 of length 73 (0 toread)
[2019/10/17 06:53:51.584544,  3] ../../source3/smbd/process.c:1541(switch_message)
  switch message SMBnegprot (pid 31195310) conn 0x0
[2019/10/17 06:53:51.584692,  3] ../../source3/smbd/negprot.c:636(reply_negprot)
  Requested protocol [NT LM 0.12]
[2019/10/17 06:53:51.584739,  3] ../../source3/smbd/negprot.c:636(reply_negprot)
  Requested protocol [SMB 2.002]
[2019/10/17 06:53:51.584776,  3] ../../source3/smbd/negprot.c:636(reply_negprot)
  Requested protocol [SMB 2.???]
[2019/10/17 06:53:51.585448,  3] ../../source3/smbd/smb2_negprot.c:294(smbd_smb2_request_process_negprot)
  Selected protocol SMB2_FF
[2019/10/17 06:53:54.243885,  3] ../../source3/smbd/server_exit.c:236(exit_server_common)

If I run this smbclient command on the AIX server I get this response:

AIXBOX:root >smbclient -L localhost -U%
protocol negotiation failed: NT_STATUS_IO_TIMEOUT

I can telnet to port 445 on the AIX box from a Windows machine so port is visible.

I am including all my config files below to see if anyone can help point me in the right direction. My feelings are this is something to do with krb5.conf and the WINBIND file that doesn't exist on my system perhaps?
Or is it because I'm joining the Windows Domain as a regular Windows user and not a Domain Admin account?

server string = "IBM AIX Server"
log file = /var/log/samba.log
passdb backend = tdbsam
idmap config * : backend = tdb
idmap config * : range   = 1000-9999
idmap config UTILITY :backend = ad
idmap config UTILITY:schema_mode = rfc2307
idmap config UTILITY:range = 10000-10099

log level = 3
netbios name = AIXBOX
workgroup = ROBOT
usershare allow guests = yes
domain master = no
local master = no
password server = *
security = ADS
encrypt passwords = yes
template shell = /usr/bin/bash
interfaces = en0
winbind use default domain = yes
client use spnego = no
kerberos method = system keytab

path = /home/share
read only = No
writable = yes
guest ok = yes
public = yes
browseable = yes
valid users = @"domain computers"

path = /buuk
browseable = yes
valid users = my_windows_user_name

        program = /usr/lib/security/WINBIND          (DOES NOT EXIST ON MY AIX SYSTEM)

        program = /usr/lib/security/NIS
        program_64 = /usr/lib/security/NIS_64

        program = /usr/lib/security/DCE   (DOES NOT EXIST ON MY AIX SYSTEM)

        program = /usr/lib/security/KRB5A
        options = authonly

        options = db=BUILTIN,auth=KRB5A


 default = FILE:/var/log/krb5libs.log
 kdc = FILE:/var/log/krb5kdc.log
 admin_server = FILE:/var/log/kadmind.log

 default_realm = ROBOT.LOCAL
 default_keytab_name = FILE:/etc/krb5.keytab
 dns_lookup_realm = false
 dns_lookup_kdc = false
 ticket_lifetime = 24h
 renew_lifetime = 7d
 forwardable = true

  default_domain = ROBOT.LOCAL

Last edited by linuxsnake; 10-17-2019 at 08:55 AM..
# 12  

I've resolved the above issue after multiple changes to the samba config. In the end the issue was down to one entry in the smb.conf

kerberos method = system keytab

Solution - delete and it uses secret.

Now I've moved slightly further. I see the network share now. When I attempt to open the file share from windows checking samba.log I see these errors

[2019/10/17 09:08:43.441931,  3] ../../source3/auth/user_krb5.c:164(get_user_from_kerberos_info)
  get_user_from_kerberos_info: Username ROBOT\Joe.Bloggs is invalid on this system
[2019/10/17 09:08:43.441978,  3] ../../source3/auth/auth_generic.c:147(auth3_generate_session_info_pac)
  auth3_generate_session_info_pac: Failed to map kerberos principal to system user (NT_STATUS_LOGON_FAILURE)
[2019/10/17 09:08:43.442081,  3] ../../source3/smbd/smb2_server.c:3213(smbd_smb2_request_error_ex)
  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1] status[NT_STATUS_ACCESS_DENIED] || at ../../source3/smbd/smb2_sesssetup.c:146
[2019/10/17 09:08:43.443099,  3] ../../source3/smbd/server_exit.c:236(exit_server_common)

It's as if its expecting the windows username to exist on my AIX server. Do I need to manually add the user to my AIX box or is there a way to have AIX automatically log this user on regardless if they have an account on the AIX system. For example can I force them to logon as the oracle user?
# 13  
UPDATE: I now finally have Samba Shares working on AIX 7.1.... However this was only after using a smbmap user list (To map individual Windows user to the root account on my AIX box)

For the Windows to Unix Mapping I added this to samba.conf
username map = /home/robot/smbmap

Inside smbmap we have this:
root = ROBOT\joe.bloggs
The root user is then defined in the file share in smb.conf as follows:
path = /tmp
browseable = yes
read only = No
writable = yes
valid users = root
public = yes
force user = root
force group = system

Now when joe.bloggs opens the AIX file share from Windows he is mapped to the local root user and has access to the file share.

Now the only issue I have is that I don't want to have to add 10 + separate Windows users manually into the smbmap file. Currently I have tested with one account joe.bloggs.
Is there a way to configure samba so that if a Windows user is part of a specific windows group such as "domain admins" that they will automatically be mapped to the local AIX root user?

I'm sure there is an easier way than manually adding 10 + Windows AD usernames to the smbmap file manually.......

I also have an issue with wbinfo. I can run wbinfo -u and wbinfo -g commands fine and they return a list of all windows domain users and groups.
But if I try and query a list of users in a specific Windows group using wbinfo --group-info="domain users" this fails.

failed to call wbcGetgrnam: WBC_ERR_DOMAIN_NOT_FOUND
Could not get info for group domain users

Last edited by linuxsnake; 10-21-2019 at 05:02 AM..
# 14  
according to the IBM developer forum, you need to do this:

1) /etc/netsvc.conf
passwd: files compat winbind
group: files compat winbind

2) /usr/lib/security/methods.cfg should have this entry.
        program = /usr/lib/security/WINBIND
        options = authonly

/usr/lib/security/WINBIND should point to /opt/freeware/lib/
# ls -l /usr/lib/security/WINBIND
lrwxrwxrwx 1 root system 28 Oct  9  2017 /usr/lib/security/WINBIND -> /opt/freeware/lib/

3) Edit /etc/security/user to set the below things under "default"
registry = WINBIND

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