TweetFollow Us on Twitter

 Integrating OS X With OpenLDAP/Samba, Part 2

Volume Number: 25 (2009)
Issue Number: 01
Column Tag: Network Administration

Integrating OS X With OpenLDAP/Samba, Part 2

An article, in a series, on "Configuring Your Mac To Work With Linux Samba and LDAP Servers."

by Noah Gift

Introduction

In Part 1 we covered talking to a Samba Server running on an Ubuntu Virtual Machine, but we stopped at merely obtaining read only access to data. In this article we fully configure Samba on Linux in an ideal configuration for OS X, and then get into authenticating all of this to LDAP on Linux.

Because we delve into a fairly complex undertaking of getting Linux and Samba configured inside of OS X, it is important to point out how powerful this combination truly is. OS X, universally known for simplicity and ease of use, can yet again, hide the complexity of a Linux server within the shadows of its own operating system by using virtualization. Linux servers talking to, and running inside of OS X is a very compelling choice to consider, as it combines the strengths of both platforms, and minimizes their respective weaknesses.

Dirt Simple Home Samba Configuration

In the last article, we downloaded a pre-configured Ubuntu Virtual Machine here: http://examples.oreilly.com/9780596515829/vm/ and then got it talking to Samba, but we only had Read-Only access. Now it is time to optimize the configuration file to make file-sharing work completely with OS X for a typical home setup behind a firewall.

If you remember from the previous article, we created a very minimal read only configuration. Here are the steps to get a full read/write configuration working from scratch with zero authentication. This is perfect for a home network behind a firewall, in which no username or password is desired in order to connect to the share/.

If you are still working off of the downloaded virtual machine, then go ahead and edit /etc/samba/smb.conf and add the contents below. (Remember that the username and password is py4sa. Alternately, you can simply use this configuration on existing Ubuntu Virtual Machine or server you already have running.)

Step 1: Edit the smb.conf file

Listing 1: (zero security) samba config /etc/samba/smb.conf

[global]
workgroup = home
netbios name = py4sa
security = share
[share]
comment = Home File Server
path = /usr/export
force user = py4sa
force group = py4sa
guest ok = yes
read only = no

With this configuration file squared away, next we need to create the actual directory to share out, change the ownership, and restart samba.

Step 2: Create the shared directory mentioned in the configuration file

py4sa@py4sa:~$ sudo mkdir /usr/export

Step 3: Change ownership to match the "forced" user and group privileges we set in the configuration file

py4sa@py4sa:~$ sudo chown -R py4sa:py4sa /usr/export

Step 4: Restart the samba daemon

py4sa@py4sa:~$ sudo killall -HUP smb

With this out of the way, we can perform a command line debugging step first to see if our share is available. Under OS X, we can simply run this command (note that your IP address may be different):

[ngift@macintosh-8][H:743][J:0]# sudo smbclient -L //192.168.1.200

Next, we should see some form of output like this:

Domain=[HOME] OS=[Unix] Server=[Samba 3.0.26a]
   Sharename    Type   Comment
   ————-    ——   ———-
   share        Disk   Home File Server
   IPC$         IPC    IPC Service (Samba 3.0.26a)
Domain=[HOME] OS=[Unix] Server=[Samba 3.0.26a]
   Server               Comment
   ————-            ———-
   PY4SA                Samba 3.0.26a
   Workgroup            Master
   ————-            ———-
   HOME                 PY4SA
   MOTHERSHIP           MOTHERSHIP

Here, we can see that our share is indeed alive, and it is named "share", with a comment "Home File Server", just as we wrote. I am a huge advocate of doing the simplest possible thing that will work, and in our situation, this is quite literally, the simplest possible configuration a user could want on a home network.

This configuration creates a simple read/write share that requires no password from a Mac. In the next section, we will go through the connection process.

Mounting Samba Read/Write As Guest

Now, that we have Samba configured, and running, we can simply mount the volume by using "Apple + K". Here is a sequence of screenshots showing the processes.


Figure 1: Connect To The Samba Server


Figure 2: Authenticate as Guest (No password required)


Figure 3: Test Read/Write Privileges

In the sequence of screenshots shown in Figures 1 through 3, we demonstrate how handy this simple "home brew" Samba Server really is. It allows us to setup read/write privileges for a guest user in seconds. Having this tip in your back pocket can sure get you out of some potential problems in a pinch, such as sharing a common web development environment. The nice thing about using a virtual machine running inside of your Mac is that the complexity can simply be turned off when you're done, or alternately, it can run forever as a server inside of a desktop Mac, or perhaps Mac Mini.

Now that we have conquered the simple Samba setup for OS X clients, let's get into conquering the simple LDAP setup for OS X clients.

OS X to Linux LDAP Configuration in 60 Seconds

LDAP is another protocol that can be a complete pain to deal with, as it can get quite complex for the newbie in a hurry. In this section, though, we reuse a pre-configured "vanilla" Ubuntu LDAP server running on the virtual machine we downloaded, and shudder, authenticate our OS X client directly to it in about 60 seconds. One of the reasons why this is so easy is because we have a pre-configured virtual machine, which hides the complexity of setting up LDAP initially from scratch.

Our goal in this section is, once again to do the simplest possible thing that works. Here is a sequence of screenshots of authenticating to LDAP:


Figure 4: Using Directory Utility to create a connection to LDAP


Figure 5: Read the error message, (Note, Linux LDAP doesn't just work out of the box).


Figure 6: We use advanced settings to configure a RFC 2307 mapping (chosen from the drop-down menu).


Figure 7: Still using Directory Utility, we manually add our new LDAP server to the search path.


Figure 8: In the Accounts Preference Pane, we setup "fast user switching," simply to allow easy testing of LDAP user account logins

Authenticating to LDAP from OS X

Now that we are configured to talk to Linux LDAP, let's test it out from the command line by interactively exploring our LDAP session from the awesome "dscl" command line tool.

Listing 2: exploring LDAP from the command line

[ngift@macintosh-8][H:753][J:0]# dscl
Entering interactive mode... (type "help" for commands)
 > ls
BSD
LDAPv3
Local
Search
Contact
 > cd LDAPv3/
/LDAPv3 > ls
192.168.1.200
/LDAPv3 > cd 192.168.1.200/
/LDAPv3/192.168.1.200 > ls
Automount
AutomountMap
CertificateAuthorities
Groups
Mounts
People
Users
/LDAPv3/192.168.1.200 > cd Users/
/LDAPv3/192.168.1.200/Users > ls
nobody
py4sa
root

This interactive session for the dscl command shows us that we are indeed connected to the LDAP directory on the Linux server, and can see the user accounts on that machine, such as py4sa. Next, let's actually login using that account.

If you notice, we can log in as the py4sa user, but we get a weird error from bash, because there is no home directory specified inside of LDAP.

Listing 3: using py4sa to login

[ngift@macintosh-8][H:761][J:0]# su py4sa  
Password:
bash: /home/py4sa/.bashrc: Input/output error
bash-3.2$ whoami
py4sa

The final thing to test is to actually do a fast user switch login to the new "py4sa" account that gets pulled from the LDAP database on the Virtual Machine. If you go through with the process it will hang for about 30 seconds, and then bring up a warning that it couldn't find the user's home directory, yet still login, to a temporary home directory.

So what does this prove? Well, it proves that we have the simplest possible Samba, and LDAP connections running from a pre-configured virtual machine. Not to shabby for some virtual machine file on your file system.

Conclusion

In this second article in a four part series, we fully configured a Read/Write Samba share running off of a virtual machine. The security was intentionally set to allow not require a user name and password, as this is very appropriate for ad hoc or home networking.

Next, we did the simplest possible LDAP authentication we could by configuring OS X to talk to the same virtual machine. We stopped at really doing anything too useful though, as we weren't able to use a home directory yet. In the next article, we go beyond our simple Home Samba Server, and lightweight LDAP configuration, to setup a sample Enterprise configuration, that ties in home directories, 3rd party LDAP administration tools, and more. In the final and fourth article we then take our enterprise LDAP/Samba configuration, and make tie in authentication to Apache and Trac. This allows for one firecracker of a virtual machine, that again, is just some file sitting on your OS X box.

BIBLIOGRAPHY AND REFERENCES

Noah Gift. "How To Build A Dirt Easy NAS with Samba". Red Hat Magazine, http://www.redhatmagazine.com/2007/06/26/how-to-build-a-dirt-easy-home-nas-server-using-samba/.

Noah Gift. "Getting Started With Open Directory". O'Reilly. http://www.macdevcenter.com/pub/a/mac/2007/06/01/discover-the-power-of-open-directory.html

Noah Gift and Jeremy Jones. "Python For Unix and Linux Systems Administration". O'Reilly . ISBN: 0596515820


Noah Gift has been a Mac user since his family bought a Macintosh Performa 6300 in 1992, and started connected to BBS networks immediately and then eventually the World Wide Web in 1993 when it become open to the public. He is the co-author of "Python For Unix and Linux System Administration" by O'Reilly, and the upcoming "Google App Engine In Action" by Manning. Noah has a couple of decades of experience in the Television and Film industry starting off as an editor for ABC Network News as a teenager. He contributed to the first feature animated film for Disney Feature Animation and Sony Imageworks. He also had stints at Turner Studios and Caltech, where he worked for the Nobel Prize winning President as a Mac expert. He has a Master's degree in CIS, and is LPI and ACSA certified. He currently works for Weta Digital in New Zealand. Many of his projects and writing are available at www.noahgift.com. He can be contacted at noah.gift@giftcs.com

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Viber 6.8.6 - Send messages and make cal...
Viber lets you send free messages and make free calls to other Viber users, on any device and network, in any country! Viber syncs your contacts, messages and call history with your mobile device, so... Read more
Carbon Copy Cloner 4.1.17 - Easy-to-use...
Carbon Copy Cloner backups are better than ordinary backups. Suppose the unthinkable happens while you're under deadline to finish a project: your Mac is unresponsive and all you hear is an ominous,... Read more
EtreCheck 3.4.2 - For troubleshooting yo...
EtreCheck is an app that displays the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to... Read more
Hopper Disassembler 4.2.10- - Binary dis...
Hopper Disassembler is a binary disassembler, decompiler, and debugger for 32- and 64-bit executables. It will let you disassemble any binary you want, and provide you all the information about its... Read more
VueScan 9.5.81 - Scanner software with a...
VueScan is a scanning program that works with most high-quality flatbed and film scanners to produce scans that have excellent color fidelity and color balance. VueScan is easy to use, and has... Read more
iFFmpeg 6.4.2 - Convert multimedia files...
iFFmpeg is a comprehensive media tool to convert movie, audio and media files between formats. The FFmpeg command line instructions can be very hard to master/understand, so iFFmpeg does all the hard... Read more
Fantastical 2.4.1 - Create calendar even...
Fantastical 2 is the Mac calendar you'll actually enjoy using. Creating an event with Fantastical is quick, easy, and fun: Open Fantastical with a single click or keystroke Type in your event... Read more
Fantastical 2.4.1 - Create calendar even...
Fantastical 2 is the Mac calendar you'll actually enjoy using. Creating an event with Fantastical is quick, easy, and fun: Open Fantastical with a single click or keystroke Type in your event... Read more
Live Home 3D Pro 3.2.2 - $69.99
Live Home 3D Pro, a successor of Live Interior 3D, is the powerful yet intuitive home design software that lets you build the house of your dreams right on your Mac. It has every feature of Live Home... Read more
Live Home 3D Pro 3.2.2 - $69.99
Live Home 3D Pro, a successor of Live Interior 3D, is the powerful yet intuitive home design software that lets you build the house of your dreams right on your Mac. It has every feature of Live Home... Read more

Latest Forum Discussions

See All

Glyph Quest Chronicles guide - how to ma...
Glyph Quest returns with a new free-to-play game, Glyph Quest Chronicles. Chronicles offers up more of the light-hearted, good humored fantasy fun that previous games featured, but with a few more refined tricks up its sleeve. It's a clever mix of... | Read more »
Catch yourself a Lugia and Articuno in P...
Pokémon Go Fest may have been a bit of a disaster, with Niantic offering fans full refunds and $100 worth of in-game curency to apologize for the failed event, but that hasn't ruined trainers' chances of catching new legendary Pokémon. Lugia nad... | Read more »
The best deals on the App Store this wee...
There are quite a few truly superb games on sale on the App Store this week. If you haven't played some of these, many of which are true classics, now's the time to jump on the bandwagon. Here are the deals you need to know about. [Read more] | Read more »
Realpolitiks Mobile (Games)
Realpolitiks Mobile 1.0 Device: iOS Universal Category: Games Price: $5.99, Version: 1.0 (iTunes) Description: PLEASE NOTE: The game might not work properly on discontinued 1GB of RAM devices (iPhone 5s, iPhone 6, iPhone 6 Plus, iPad... | Read more »
Layton’s Mystery Journey (Games)
Layton’s Mystery Journey 1.0.0 Device: iOS Universal Category: Games Price: $15.99, Version: 1.0.0 (iTunes) Description: THE MUCH-LOVED LAYTON SERIES IS BACK WITH A 10TH ANNIVERSARY INSTALLMENT! Developed by LEVEL-5, LAYTON’S... | Read more »
Full Throttle Remastered (Games)
Full Throttle Remastered 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Originally released by LucasArts in 1995, Full Throttle is a classic graphic adventure game from industry legend Tim... | Read more »
Stunning shooter Morphite gets a new tra...
Morphite is officially landing on iOS in September. The game looks like the space shooter we've been needing on mobile, and we're going to see if it fits the bill quite shortly. The game's a collaborative effort between Blowfish Studios, We're Five... | Read more »
Layton's Mystery Journey arrives to...
As you might recall, Layton's Mystery Journey is headed to iOS and Android -- tomorrow! To celebrate the impending launch, Level-5's released a new trailer, complete with an adorable hamster. [Read more] | Read more »
Sidewords (Games)
Sidewords 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Grab a cup of coffee and relax with Sidewords. Sidewords is part logic puzzle, part word game, all original. No timers. No... | Read more »
Noodlecake Games' 'Leap On!...
Noodlecake Games is always good for some light-hearted arcade fun, and its latest project, Leap On! could carry on that tradition. It's a bit like high stakes tetherball in a way. Your job is to guide a cute little blob around a series of floating... | Read more »

Price Scanner via MacPrices.net

Apple Move Away from White Label Event Apps C...
DoubleDutch, Inc., a global provider of Live Engagement Marketing (LEM) solutions, has made a statement in the light of a game-changing announcement from Apple at this year’s WWDC conference.... Read more
70 Year Old Artist Creates Art Tools for the...
New Hampshire-based developer Pirate’s Moon has announced MyArtTools 1.1.3, the update to their precision drawing app, designed by artist Richard Hoeper exclusively for use with the 12.9-inch iPad... Read more
Sale! New 2017 13-inch 2.3GHz MacBook Pros fo...
Amazon has new 2017 13″ 2.3GHz/128GB MacBook Pros on sale today for $150 off MSRP including free shipping. Their prices are the lowest available for these models from any reseller: – 13″ 2.3GHz/128GB... Read more
13″ 2.3GHz/128GB Space Gray MacBook Pro on sa...
MacMall has the 13″ 2.3GHz/128GB Space Gray MacBook Pro (MPXQ2LL/A) on sale for $1219 including free shipping. Their price is $80 off MSRP. Read more
Clearance 2016 12-inch Retina MacBooks, Apple...
Apple recently dropped prices on Certified Refurbished 2016 12″ Retina MacBooks, with models now available starting at $1019. Apple will include a standard one-year warranty with each MacBook, and... Read more
Save or Share
FotoJet Designer, is a simple but powerful new graphic design apps available on both Mac and Windows. With FotoJet Designer’s 900+ templates, thousands of resources, and powerful editing tools you... Read more
Logo Maker Shop iOS App Lets Businesses Get C...
A newly released app is designed to help business owners to get creative with their branding by designing their own logos. With more than 1,000 editable templates, Logo Maker Shop 1.0 provides the... Read more
Sale! New 15-inch MacBook Pros for up to $150...
Amazon has the new 2017 15″ MacBook Pros on sale for up to $150 off MSRP including free shipping: – 15″ 2.8GHz MacBook Pro Space Gray: $2249 $150 off MSRP – 15″ 2.89Hz MacBook Pro Space Gray: $2779 $... Read more
DEVONthink To Go 2.1.7 For iOS Brings Usabili...
DEVONtechnologies has updated DEVONthink To Go, the iOS companion to DEVONthink for Mac, with enhancements and bug fixes. Version 2.1.7 adds an option to clear the Global Inbox and makes the grid... Read more
15-inch 2.2GHz Retina MacBook Pro, Apple refu...
Apple has Certified Refurbished 2015 15″ 2.2GHz Retina MacBook Pros available for $1699. That’s $300 off MSRP, and it’s the lowest price available for a 15″ MacBook Pro. An Apple one-year warranty is... Read more

Jobs Board

*Apple* Solutions Consultant (ASC) - Poole -...
Job Summary The people here at Apple don't just create products - they create the kind of wonder that's revolutionised entire industries. It's the diversity of those Read more
SW Engineer *Apple* TV - Apple Inc. (United...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more Read more
Frameworks Engineering Manager, *Apple* Wat...
Frameworks Engineering Manager, Apple Watch Job Number: 41632321 Santa Clara Valley, California, United States Posted: Jun. 15, 2017 Weekly Hours: 40.00 Job Summary Read more
Product Manager - *Apple* Pay on the *Appl...
Job Summary Apple is looking for a talented product manager to drive the expansion of Apple Pay on the Apple Online Store. This position includes a unique Read more
*Apple* Retail - Multiple Positions - Apple...
SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.