krypted.com

Tiny Deathstars of Foulness

I’ve seen a few instances where an upgrade caused Final Cut to run kinda’ strangely. To resolve, I’ve just been doing a quick reinstall of Final Cut. To do so:

  • First move the Final Cut application to the trash (it’s in the /Applications folder).
  • From your home folder, go to ~/Library/Application Support and move the Final Cut folder in there into the trash.
  • From Library/Preferences in your home folder, put com.apple.FinalCut.plist, com.apple.FinalCut.LSSharedFileList and com.apple.FinalCut.UserDestinations.plist in the trash.
  • Finally, trash com.apple.FinalCut directory from ~/Library/Caches.

Once done, go back to the Mac App Store and reinstall Final Cut and open it. Those folders you just tossed out will get re-created. Your toolbars and other customizations are likely to be gone, so you’ll have to spend a few minutes getting your workspace back to the way you had it, but if Final Cut was acting oddly it should be back to normal.

Good luck!

January 21st, 2015

Posted In: Final Cut Server, Mac OS X

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Yay, podcasts! Chuck Joiner was kind enough to have me on MacVoices. We did a show, now available at http://www.macvoices.com/macvoices-14223-charles-edge-helps-take-control-os-x-server

Or if you’d like to watch on YouTube or inline:

http://youtu.be/AeccoRqIrgc

November 26th, 2014

Posted In: iPhone, Mac OS X, Mac OS X Server, Mac Security

Tags: , , , , ,

A blog is a great way to communicate information. But pedagogy, yo… Blogs are not great ways to teach in a guided manner. But they can be. So with a little Table of Contents, or a Guide of sorts, you can easily communicate in a fashion similar to a book. And this makes the third annual OS X Server Guide that I’m publishing in this manner; the guides for Mavericks and Mountain Lion are  still available. I doubt I’ll ever actually bother to take them down.

I’ve been working on getting the annual guide up for a few weeks and while there are still some posts remaining, but it’s basically done (some articles just haven’t gone up yet, but they’re basically written). So, if you’re fighting the good fight (and I do think it’s a good fight) and rolling Yosemite Server, click over on http://krypted.com/guides/yosemite-server for the latest guide, covering OS X Server 4 running on OS X Yosemite (which I still like to call Yosemite Server).

Screen Shot 2014-11-04 at 7.49.04 PM

Oh, and if you’re keeping track (doubtful): yah, I know I never finished the Windows Server Guide, but I did write and finish the Xsan one and there might have been a divorce, 2 books, a product release, job change and a few benders mixed in there – one of which might still be ongoing… So I’ll eventually get back to it. Or not….

November 5th, 2014

Posted In: Articles and Books, Mac OS X, Mac OS X Server, Mac Security, Mass Deployment

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Apple began rolling out new features with the new Volume Purchasing Program (VPP) program last year. There are lots of good things to know, here. First, the old way should still work. You’re not loosing the stuff you already invested in such as Configurator with those codes you might have used last year with supervision. However, you will need an MDM solution (Profile Manager, Casper, Absolute, FileWave, etc) to use the new tools. Also, the new token options are for one to one (1:1) environments. This isn’t for multi-tenant environments. You can only use these codes and options for iOS 7 and OS X 10.9 and 10.10. Also, if you install your vpptoken on Yosemite Server and you’re running that same vpptoken elsewhere, Yosemite Server will take all of the codes that have been issued for itself (feature or bug, you decide).

But this article isn’t about the fine print details of the new VPP. Instead, this article is about making Profile Manager work with your new VPP token. Before you get started, know that when you install your vpptoken, if it’s in use by another MDM, Profile Manager will unlicensed all apps with your other MDM. To get started, log into your VPP account. Once logged in, click on your account email address and then select Account Summary.

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Then, click on the Download Token link and your token will be downloaded to your ~/Downloads (or wherever you download stuff).

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Once you have your token, open the Server app and click on the Profile Manager service.

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Click on the checkbox for Distribute apps and books from the Volume Purchase Program.

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At the VPP Managed Distribution screen, drag the .vpptoken file downloaded earlier into the screen.

Click Continue. The VPP code email address will appear in the screen. Click Done.

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Back at the profile manager screen, you should then see that the checkbox is filled and you can now setup Profile Manager.

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The rest of the configuration of Profile Manager is covered in a previous article.

Note: The account used to configure the VPP information is not tracked in any serveradmin settings.

October 17th, 2014

Posted In: iPhone, Mac OS X, Mac OS X Server, Mac Security, Mass Deployment

Tags: , , , , , , , , , , , ,

Profile Manager first appeared in OS X Lion Server as the Apple-provided tool for managing Apple devices, including Mobile Device Management (MDM) for iOS based devices as well as Profile management for OS X based computers, including MacBooks, MacBook Airs, Mac Minis, Mac Pros and iMacs running Mac OS X 10.7 and up. In OS X Mountain Lion, Apple added a number of new features to Profile Manager and revved the software to Profile Manager 2.0, most notably adding the ability to push certain types of apps to mobile devices. In Mavericks Server (Server 3), Apple provides new options and streamlined a bunch of things, most notably App Store and VPP integration. In subsequent releases (point releases) Apple also added DEP functionality and you can also now distribute content (in the form of books) to devices. In this article we’ll get Profile Manager setup and perform some basic tasks.

Preparing For Profile Manager

Before we get started, let’s prep the system for the service. This starts with configuring a static IP address and properly configuring a host name for the server. In this example, the hostname will be YosemiteSam.krypted.com. We’ll also be using a self-signed certificate, although it’s easy enough to generate a CSR and install it ahead of time. For the purposes of this example, we have installed Server from the App Store (and done nothing else with Server except open it the first time so it downloads all of its components from the web) and configured the static IP address using the Network System Preferences. Next, we’ll set the hostname using scutil.

sudo scutil --set HostName YosemiteSam.krypted.com

Then the ComputerName:

sudo scutil --set ComputerName YosemiteSam.krypted.com

And finally, the LocalHostName:

sudo scutil --set LocalHostName YosemiteSam

Now check changeip:

sudo changeip -checkhostname

The changeip command should output something similar to the following:

Primary address = 192.168.210.201
Current HostName = YosemiteSam.krypted.com
DNS HostName = YosemiteSam.krypted.com
The names match. There is nothing to change.
dirserv:success = "success"

f you don’t see the success and that the names match, you might have some DNS work to do next, according to whether you will be hosting DNS on this server as well. If you will be hosting your own DNS on the Profile Manager server, then the server’s DNS setting should be set to the IP address of the Server. To manage DNS, start the DNS service and configure as shown previously:

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Provided your DNS is configured properly then changeip should work. If you’re hosting DNS on an Active Directory integrated DNS server or some other box then just make sure you have a forward and reverse record for the hostname/IP in question.

Profile Manager is built atop the web service, APNS and Open Directory. Next, click on the Web service and just hit start. While not required for Profile Manager to function, it can be helpful. We’re not going to configure anything else with this service in this article so as not to accidentally break Profile Manager. Do not click on anything while waiting for the service to start. While the indicator light can go away early, note that the Web service isn’t fully started until the path to the default websites is shown (the correct entry, as seen here, should be /Library/Server/Web/Data/Sites/Default) and a View Server Website link is shown at the bottom of the screen. If you touch anything too early then you’re gonna’ mess something up, so while I know it’s difficult to do so, be patient (honestly, it takes less than a minute, wait for it, wait for it, there!).

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Once the Web service is started and good, click on the View Server Web Site link at the bottom and verify that the Welcome to OS X Server page loads.

Setting Up Profile Manager

Provided the Welcome to OS X Server page loads, click on the Profile Manager service. Here, click on the Configure button.

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At the first screen of the Configure Device Management assistant, click on Next.

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Assuming the computer is not yet an Open Directory master or Replica, and assuming you wish to setup a new Open Directory Master, click on Create a new Open Directory domain at the Configure Network Users and Groups screen.

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Then click on Next. At the Directory Administrator screen, provide the username and password you’d like the Open Directory administrative account to have (note, this is going to be an Open Directory Master, so this example diradmin account will be used to authenticate to Workgroup Manager if we want to make changes to the Open Directory users, groups, computers or computer groups from there). Once you’re done entering the correct information, click Next.

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At the Organization Information screen, enter your information (e.g. name of Organization and administrator’s email address). Keep in mind that this information will be in your certificate (and your CSR if you submit that for a non-self-signed certificate) that is used to protect both Profile Manager and Open Directory communications. Click Next.

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At the Confirm Settings screen, make sure the information that will be used to configure Open Directory is setup correctly. Then click Set Up (as I’ve put a nifty red circle next to – although it probably doesn’t help you find it if it’s the only button, right?).

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The Open Directory master is then created. At the Organization Information screen, enter the name of the contact information for an administrator and click on the Next button. Even if you’re tying this thing into something like Active Directory, this is going to be a necessary step (unless of course you’re already running Open Directory on the system). Once Open Directory is setup you will be prompted to provide the information for an SSL Certificate.

At the Organization Information screen, enter your information and click Next.

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At the Configure an SSL Certificate screen, choose a certificate and click Next.

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This can be the certificate provided when Open Directory is initially configured, which is self-signed, or you can select a certificate that you have installed using a CSR from a 3rd party provider. At this point, if you’re using a 3rd party Code Signing certificate you will want to have installed it as well. Choose a certificate from the Certificate: drop-down list and then click on Next.

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If using a self-signed certificate you will be prompted that the certificate isn’t signed by a 3rd party. Click Next if this is satisfactory.

If you do not already have a push certificate installed for the system, you will then be prompted to enter the credentials for an Apple Push Notification Service (APNS) certificate. This can be any valid AppleID. It is best to use an institutional AppleID (e.g. push@krypted.com) rather than a private one (e.g. charles@krypted.com). Once you have entered a valid AppleID username and password, click Next.

Provided everything is working, you’ll then be prompted that the system meets the Profile Manager requirements. Click on the Finish button to complete the assistant.

When the assistant closes, you will be back at the Profile Manager screen in the Server application. Here, check the box for Sign Configuration Profiles.

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The Code Signing Certificate screen then appears. Here, choose the certificate from the Certificate field.

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Unless you’re using a 3rd party certificate there should only be one certificate in the list. Choose it and then click on OK. If you are using a 3rd party certificate then you can import it here, using the Import… selection.

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If you host all of your services on the one server (Mail, Calendars, VPN, etc) then leave the box checked for Include configuration for services; otherwise uncheck it.

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One of the upgrades in Profile Manager 2.2 is the ability to distribute objects from the App Store Volume Purchase Program through Profile Manager. To use this option, first sign up on the VPP site. Once done, you will receive a token file. Using the token file, check the box for “Distribute apps and books from the Volume Purchase Program” and then use the Choose button to select the token file.

Now that everything you need is in place, click on the ON button to start the service and wait for it to finish starting (happens pretty quickly).

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Once started, click on the Open Profile Manager link and the login page opens. Administrators can login to Profile Manager to setup profiles and manage devices.

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The URL for this (for YosemiteSam.krypted.com) is https://YosemiteSam.krypted.com/profilemanager. Use the Everyone profile to automatically configure profiles for services installed on the server if you want them deployed to all users. Use custom created profiles for everything else. Also, under the Restrictions section for the everyone group, you can choose what to allow all users to do, or whether to restrict access to certain Profile Manager features to certain users. These include access to My Devices (where users enroll in the system), device lock (so users can lock their own devices if they loose them) and device wipe. You can also allow users to automatically enroll via DEP and Configurator using this screen.

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Enrolling Into Profile Manager

To enroll devices for management, use the URL https://YosemiteSam.krypted.com/MyDevices (replacing the hostname with your own). Click on the Profiles tab to bring up a list of profiles that can be installed manually.

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From Profiles, click or tap the Enroll button. The profile is downloaded and when prompted to install the profile, click Continue.

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Then click Install if installing using a certificate not already trusted.

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Once enrolled, click on the Profile in the Profiles System Preference pane to see the settings being deployed.

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You can then wipe or lock the device from the My Devices portal. Management profiles from the MDM server are then used. Devices can opt out from management at any time. If you’re looking for more information on moving Managed Preferences (MCX) from Open Directory to a profile-based policy management environment, review this article and note that there are new options in dscl for removing all managed preferences and working with profiles in Mavericks (10.9) and Yosemite (10.10).

If there are any problems when you’re first getting started, an option is always to run the wipeDB.sh script that resets the Profile Manager (aka, devicemgr) database. This can be done by running the following command:

sudo /Applications/Server.app/Contents/ServerRoot/usr/share/devicemgr/backend/wipeDB.sh

Automating Enrollment & Random Management Tips

The two profiles needed to setup a client on the server are accessible from the web interface of the Server app. Saving these two profiles to a Mac OS X computer then allows you to automatically enroll devices into Profile Manager using Apple Configurator, as shown in this previous article.
When setting up profiles, note that the username and other objects that are dynamically populated can be replaced through a form of variable expansion using payload variables in Profile Manager. For more on doing so, see this article.

Note: As the database hasn’t really changed, see this article for more information on backing up and reindexing the Profile Manager database.

Device Management

Once you’ve got devices enrolled, those devices can easily be managed from a central location. The first thing we’re going to do is force a passcode on a device. Click on Devices in the Profile Manager sidebar.

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Click on a device in Profile Manager’s admin portal, located at https:///profilemanager (in this case https://YosemiteSam.krypted.com/profilemanager). Here, you can see:

  • General Information: the type of computer, capacity of the drive, version of OS X, build version, serial number of the system and the currently logged in user.
  • Details: UDID, Ethernet MAC, Wi-Fi MAC, Model, Last Checkin Time, Available disk space, whether Do Not Disturb is enabled and whether the Personal Hotspot is enabled.
  • Security information: If FileVault is enabled, whether a Personal Recovery is set and whether an Institutional Recovery Key has been installed.
  • Restrictions, whether any restrictions have been deployed to the device from Profile Manager.
  • Installed Apps: A list of all the apps installed (packages, App Store, Drivers, via MDM, etc).
  • In Device Groups: What groups are running on the system.
  • Certificates: A list of each certificate installed on the computer.

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The device screen is where much of the management of each device is handled, such as machine-specific settings or using the cog-wheel icon, wiping, locking, etc. From the device (or user, group, user group or device group objects), click on the Settings tab and then click on the Edit button.

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Here, you can configure a number of settings on devices. There are sections for iOS specific devices, OS X specific settings and those applicable to both platforms. Let’s configure a passcode requirement for an iPad.

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Click on Passcode, then click on Configure.

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At the Passcode settings, let’s check the box for Allow simple value and then set the Minimum Passcode Length to 4. I find that with iOS, 4 characters is usually enough as it’ll wipe far before someone can brute force that. Click OK to commit the changes.

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Once configured, click Save. At the “Save Changes?” screen, click Save. The device then prompts you to set a passcode a few moments later. The next thing we’re going to do is push an app. To do so, first find an app in your library that you want to push out. Right-click (or control-click) on the app and click on Show in Finder. You can install an Enterprise App from your library or browse to it using the VPP program if the app is on the store. Before you start configuring apps, click on the Apps entry in the Profile Manager sidebar.

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At the Apps screen, use the Enterprise App entry to select an app or use the Volume Purchase Program button to open the VPP and purchase an app. Then, from the https:///profilemanager portal, click on an object to manage (in this case it’s a group called Replicants) and at the bottom of the About screen, click Enable VPP Managed Distribution Services.

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Click on the Apps tab.

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From the Apps tab, click on the plus sign icon (“+”).

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At the Add Apps screen, choose the app added earlier and then authenticate if needed, ultimately selecting the app. The app is then uploaded and displayed in the list. Click Add to add to the selected group. Then, click on Done. Then click on Save… and an App Installation dialog will appear on the iOS device you’re pushing the app to.

At the App Installation screen on the iPad, click on the Install button and the app will instantly be copied to the last screen of apps on the device. Tap on the app to open it and verify it works. Assuming it does open then it’s safe to assume that you’ve run the App Store app logged in as a user who happens to own the app. You can sign out of the App Store and the app will still open. However, you won’t be able to update the app as can be seen here.

Note: If you push an app to a device and the user taps on the app and the screen goes black then make sure the app is owned by the AppleID signed into the device. If it is, have the user open App Store and update any other app and see if the app then opens.

Finally, let’s wipe a device. From the Profile Manager web interface, click on a device and then from the cog wheel icon at the bottom of the screen, select wipe.

At the Wipe screen, click on the device and then click Wipe. When prompted, click on the Wipe button again, entering a passcode to be used to unlock the device if possible. The iPad then says Resetting iPad and just like that, the technical walkthrough is over.

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Note: For fun, you can use the MyDevices portal to wipe your iPad from the iPad itself.

Conclusion

To quote Apple’s Profile Manager page:

Profile Manager simplifies deploying, configuring, and managing them all. It’s one place where you control everything: You can create profiles to set up user accounts for mail, calendar, contacts, and messages; configure system settings; enforce restrictions; set PIN and password policies; and more. Because it’s integrated with the Apple Push Notification service, Profile Manager can send out updated configurations over the air, automatically. And it includes web-based administration, so you can manage your server from any modern web browser. Profile Manager even gives users access to a self-service web portal where they can download and install new configuration profiles, as well as clear passcodes and remotely lock or wipe their Mac, iPhone, or iPad if it’s lost or stolen.

For the money, Profile Manager is an awesome tool. Apps such as Casper MDM, AirWatch, Zenprise, MaaS360, etc all have far more options, but aren’t as easy to install and nor do they come at such a low price point. Profile Manager is a great option if all of the tasks you need to perform are available within the tool. If not, then it’s worth a look, if only as a means to learn more about the third party tools you’ll ultimately end up using. One thing I can say for it is that Profile Manager is a little faster and seems much more stable (in fact, Apple has now published scalability numbers, which they have rarely done in the past). You can also implement newer features with it, including Books distribution, Gatekeeper, DEP and Messages.

October 16th, 2014

Posted In: Mac OS X, Mac OS X Server, Mac Security, Mass Deployment

Tags: , , , , , , , , , , ,

Tools that leverage the Xcode Command Line Tools might have a problem if you install the tools without agreeing to the license. Here, you can see IntelliJ complaining about just that:
Screen Shot 2014-09-19 at 2.52.57 PM
To agree to the license agreement, you can use xcrun along with the cc verb:

sudo xcrun cc

This is an interactive command line environment so in order to script it you’d need to use expect to feed in the correct parameters.

September 26th, 2014

Posted In: Mac OS X

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After writing up the presentation for MacSysAdmin in Sweden, I decided to go ahead and throw these into a quick cheat sheet for anyone who’d like to have them all in one place. Good luck out there, and stay salty.

Get an ip address for en0:

ipconfig getifaddr en0

Same thing, but setting and echoing a variable:

ip=`ipconfig getifaddr en0` ; echo $ip

View the subnet mask of en0:

ipconfig getoption en0 subnet_mask

View the dns server for en0:

ipconfig getoption en0 domain_name_server

Get information about how en0 got its dhcp on:

ipconfig getpacket en1

View some network info:

ifconfig en0

Set en0 to have an ip address of 10.10.10.10 and a subnet mask of 255.255.255.0:

ifconfig en0 inet 10.10.10.10 netmask 255.255.255.0

Show a list of locations on the computer:

networksetup -listlocations

Obtain the active location the system is using:

networksetup -getcurrentlocation

Create a network location called Work and populate it with information from the active network connection:

networksetup -createlocation Work populate

Delete a network location called Work:

networksetup -deletelocation Work

Switch the active location to a location called Work:

networksetup -switchlocation Work

Switch the active location to a location called Work, but also show the GUID of that location so we can make scripties with it laters:

scselect Work

List all of the network interfaces on the system:

networksetup -listallnetworkservices

Rename the network service called Ethernet to the word Wired:

networksetup -renamenetworkservice Ethernet Wired

Disable a network interface:

networksetup -setnetworkserviceenabled off

Change the order of your network services:

networksetup -ordernetworkservices “Wi-Fi” “USB Ethernet”

Set the interface called Wi-Fi to obtain it if it isn’t already

networksetup -setdhcp Wi-Fi

Renew dhcp leases:

ipconfig set en1 BOOTP && ipconfig set en1 DHCP
ifconfig en1 down && ifconfig en1 up

Renew a dhcp lease in a script:

echo "add State:/Network/Interface/en0/RefreshConfiguration temporary" | sudo scutil

Configure a manual static ip address:

networksetup -setmanual Wi-Fi 10.0.0.2 255.255.255.0 10.0.0.1

Configure the dns servers for a given network interface:

networksetup -setdnsservers Wi-Fi 10.0.0.2 10.0.0.3

Obtain the dns servers used on the Wi-Fi interface:

networksetup -getdnsservers Wi-Fi

Stop the application layer firewall:

launchctl unload /System/Library/LaunchAgents/com.apple.alf.useragent.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.alf.agent.plist

Start the application layer firewall:

launchctl load /System/Library/LaunchDaemons/com.apple.alf.agent.plist
launchctl load /System/Library/LaunchAgents/com.apple.alf.useragent.plist

Allow an app to communicate outside the system through the application layer firewall:

socketfilterfw -t
“/Applications/FileMaker Pro/FileMaker Pro.app/Contents/MacOS/FileMaker Pro”

See the routing table of a Mac:

netstat -nr

Add a route so that traffic for 10.0.0.0/32 communicates over the 10.0.9.2 network interface:

route -n add 10.0.0.0/32 10.0.9.2

Log bonjour traffic at the packet level:

sudo killall -USR2 mDNSResponder

Stop Bonjour:

launchctl unload -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist


Start Bojour:

launchctl load -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

Put a delay in your pings:

ping -i 5 192.168.210.1

Ping the hostname 5 times and then stop the ping:

ping -c 5 google.com

Flood ping the host:

ping -f localhost

Set the packet size during your ping:

ping -s 100 google.com

Customize the source IP during your ping:

ping -S 10.10.10.11 google.com

View disk performance:

iostat -d disk0

Get information about the airport connection on your system:

/System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport -I

Scan the available Wireless networks:

/System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport -s

Trace the path packets go through:

traceroute google.com

Trace the routes without looking up names:

traceroute -n google.com

Trace a route in debug mode:

traceroute -d google.com

View information on all sockets:

netstat -at

View network information for ipv6:

netstat -lt

View per protocol network statistics:

netstat -s

View the statistics for a specific network protocol:

netstat -p igmp

Show statistics for network interfaces:

netstat -i

View network information as it happens (requires ntop to be installed):

ntop

Scan port 80 of www.google.com

/System/Library/CoreServices/Applications/Network\ Utility.app/Contents/Resources/stroke www.google.com 80 80

Port scan krypted.com stealthily:

nmap -sS -O krypted.com/24

Establish a network connection with www.apple.com:

nc -v www.apple.com 80

Establish a network connection with gateway.push.apple.com over port 2195

/usr/bin/nc -v -w 15 gateway.push.apple.com 2195

Establish a network connection with feedback.push.apple.com only allowing ipv4

/usr/bin/nc -v -4 feedback.push.apple.com 2196

Setup a network listener on port 2196 for testing:

/usr/bin/nc -l 2196

Capture some packets:

tcpdump -nS

Capture all the packets:

tcpdump -nnvvXS

Capture the packets for a given port:

tcpdump -nnvvXs 548

Capture all the packets for a given port going to a given destination of 10.0.0.48:

tcpdump -nnvvXs 548 dst 10.0.0.48

Capture the packets as above but dump to a pcap file:

tcpdump -nnvvXs 548 dst 10.0.0.48 -w /tmp/myfile.pcap

Read tcpdump (cap) files and try to make them human readable:

tcpdump -qns 0 -A -r /var/tmp/capture.pcap

What binaries have what ports and in what states are those ports:

lsof -n -i4TCP

Make an alias for looking at what has a listener open, called ports:

alias ports='lsof -n -i4TCP | grep LISTEN'

Report back the name of the system:

hostname

Flush the dns cache:

dscacheutil -flushcache

Clear your arp cache:

arp -ad

View how the Server app interprets your network settings:

serveradmin settings network

Whitelist the ip address 10.10.10.2:

/Applications/Server.app/Contents/ServerRoot/usr/libexec/afctl -w 10.10.10.2

Finally, the script network_info.sh shows information about a Macs network configuration. Both active and inactive network interfaces are listed, in the order that they are used by the OS and with a lot of details (MAC-address, interface name, router, subnet mask etc.).

September 25th, 2014

Posted In: Mac OS X, Mac OS X Server, Mac Security, Mass Deployment, Network Infrastructure

Tags: , , , , , , , , , , , , , , ,

I didn’t figure this out myself but can’t remember the source to attribute. Anyway, I image a lot of systems in my home lab for testing. Many tools I use (e.g. ant, metasploit, etc) need the Xcode Command Line Tools. The easy way to install these is to run xcode-select sung the –install option, as follows:

/usr/bin/xcode-select --install

September 15th, 2014

Posted In: Mac OS X, Mac OS X Server, Mac Security, Mass Deployment

Tags: , , , ,

Stroke got moved, so dug this up and am reprinting with the latest and greatest location.

Network Utility has a port scanner – it’s built in and really easy to use. Sure, stroke isn’t nmap, but it’s not trying to be… Since Network Utility is distributed with every copy of Mac OS X it stands to reason that every copy of Mac OS X has the ability to scan a port without using a GUI tool.  Enter one of the best named tools in Mac OS X, stroke.  Stroke is the command line back-end to the Port Scan tab of Network Utility.  To use stroke, you will need to cd into the Network Utility application bundle and then cd into Contents and then Resources.

Once you are at “/System/Library/CoreServices/Applications/Network Utility.app/Contents/Resources”, you will need to provide stroke with an IP address (or name), followed by the first port to scan and then the last (or the same number twice if your range is only one IP address.  For example, if you want to port scan port 80 on your own system you could use the following:

./stroke 127.0.0.1 80 80

But you shouldn’t just stroke yourself (sorry, couldn’t help it).  You should also stroke others (Clarence Carter be damned!).  So if you want to port scan www.google.com for port 80 the following would achieve such a lofty goal:

./stroke www.google.com 80 80

Because the name www.google.com has to resolve, you’re actually able to check whether a DNS error occurs and whether you can communicate over port 80 to the host in one command.  If you want to make a copy of stroke into a directory and then add it to your environment variable’s PATH you can then use it without needing to change your working directory.

September 8th, 2014

Posted In: Mac OS X, Mac Security, Network Infrastructure

Tags: , , , ,

Every now and then I need to reclaim that space in /var/vm or I need to stop a process from paging to swap files while I’m troubleshooting something else. I in no way endorse disabling swap files (which basically kills using swap files as a part of your overall virtual memory) for extended periods of time. However, it has saved me in the case of stability concerns long enough to get a system patched or something like that.

To disable OS X swap files, all you need to do is stop the com.apple.dynamic_pager daemon and restart. Use launchctl to stop:

sudo launchctl unload -wF /System/Library/LaunchDaemons/com.apple.dynamic_pager.plist

Once restarted, you may need to remove the files in /var/vm as that is where the swap files are stored. To do so, rm the contents of /var/vm:

rm /var/vm/swapfile*

You should also be able to get rid of the sleepimage file in that directory if needed. Since this is supposed to be a temporary or troubleshooting measure, to turn swapping back on:

sudo launchctl load -wF /System/Library/LaunchDaemons/com.apple.dynamic_pager.plist

January 21st, 2014

Posted In: Mac OS X, Mac OS X Server, Mac Security, Xsan

Tags: , , , , , , , ,

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