Proxy (justness) Mac OS
- Proxy (justness) Mac Os X
- Proxy (justness) Mac Os Catalina
- Proxy (justness) Mac Os Download
- Proxy (justness) Mac Os 11
What You Need
- A Mac computer running OS X. I used OS X Yosemite, butother versions should work too.
- An iPhone, iPad, or Android mobile device
Proxy use is set up through the Network section of System Preferences within Mac OS X. To access the proxy settings dialog, click the Apple icon in the upper left corner of the screen, then “System. How does one programmatically change proxy settings on a mac osx. I am fluent in ios, and since mac os programming is similar there shouldn't be much problems with it. However I lack the logic needed to create proxy changes programmatically. Manual tweaking is extremely easy. This is the network tab in System Preferences I am after: What I. My browser and other applications are using the system proxy settings, in which I have saved my username and password for authenticating with the proxy. This is working fine. There is a persistent problem with system services that try to access information on the internet and don't see to have access to the proxy credentials in my user account.
Purpose
Many mobile apps don't properly implement SSL/TLS.In this project the Mac computer is used toperform a man-in-the-middle attack usingWi-Fi and Bluetooth as shown in the diagrambelow. Any app on the mobile device can easilybe tested to see if it can detect the attack.Task 1: Sharing the Mac's Internet Connection
On the Mac, connect to a Wi-Fi network.In the top right of the Mac desktop,click the magnifying glass. In thesearch box, type terminal
Double-click Terminal,as shown below.
In the Terminal window, execute thiscommand:
ifconfigOn the top left of the Mac desktop, click theApple, 'System Preferences'.
In System Preferences, click Bluetooth.
If Bluetooth is off, turn it on,as shown below.
In System Preferences, at the upper left,click the little rectangular icon made ofdots, as outlined in green in the imageabove.
In System Preferences, click Sharing.
On the left side, click the words (not thecheck box) 'Internet Sharing'.
On the right side, in the'Share your connection from' list, selectWi-Fi.
In the 'To computer using' list, check'Bluetooth PAN', as shown below.
On the left side, click the check box next to'Internet Sharing'. In the 'Are you sure..?' box,click Start.
In the Terminal window, execute thiscommand:
ifconfigIn my case the name wasbridge0, as shown below.
Make a note of your bridge interface name.You will need it later, when youconfigure the 'pf' firewall.
TroubleshootingThe Sharing panel makes it look like you couldshare any type of network connection overany other sort of connection, but that's nottrue. There are nasty bugs here, and strangechanges Apple makes in updates that surprisepeople.When I used OS X 10.9, I was able to share aniPhone USB connection to computers using Wi-Fi,but that option was removed in OS X 10.10. If you try some other combination than Wi-Fito Bluetooth, you may have problems. |
Testing the Shared Internet Connection
On your mobile device, turn off Wi-Fi andCellular data. The images below showhow to do that on an iPad:On the mobile device, turn on Bluetooth.Click the name of your Mac computer.
On your Mac, a box pops up. Click Pair.
The portable device should now show that itis 'Connected' to the Mac, as shown below.
On your portable device, open a Webbrowser and go to a website, such asaol.com
The page should load, although it may be slow.
At this point, the Mac is in the middle--allInternet traffic from the mobile device passesthrough it. All that remains is to configureBurp and pf on the Mac to intercept andexamine that traffic.
Task 2: Install Java
Burp requires Java, so you must makesure Java is installed.
On the Mac, open a Web browser and go tojava.com
Click 'Do I have Java?',as shown below.
On the next page, click the'Verify Java Version' button.
If you see a 'Java blocked for this website'message, as shown below, click that message,and click Trust. Then click Run.
You should see the 'Congratulations!' messageshown below. If you don't, follow the instructionson the page to download and install Java.
Task 3: Start a Burp Transparent Proxy
At the upper right of the Mac desktop,click the magnifying glass icon,as shown below.In the search box, typeburpsuite. If Burp isalready on your Mac, it will be found,as shown below.
If you don't have Burp, open a Web browser,go to
and download the free version. Then repeatthe search.
In the search box, double-clickburpsuite_free.
If a box appears saying 'Are you sure..',as shown below, click Open.
TroubleshootingIf error messages appear, saying you cannotrun software from unknown sources, open'System Preferences', click'Security & Privacy', andconfigure your Mac to Allow apps downloadedfrom Anywhere,as shown below. |
If the Intercept button reads'Intercept is on', click it,so the message reads'Intercept is off',as shown below.
Click the Options sub-tab.At the top, in the 'Proxy Listeners'section, see if there are any entrieson the box shown to the right.
If there are, click each entry tohighlight it, and then clickRemove to remove them all,as shown below.
In Burp,Aat the top, in the 'Proxy Listeners'section, click the Add button.
On the Binding tab,enter a 'Bind to port' of 8080
Click the 'All interfaces'button,as shown below.
Click the 'Request handling'tab.
Click the 'Support invisible proxying'box,as shown below.
At the lower right of the box, clickOK. A box pops up,asking 'Are you sure..?'. ClickYes.
Burp should now show a Listeneron '*:8080' with the Invisible boxchecked,as shown below.
On the line showing '*:8080', clickthe Running check box twice tocheck it,as shown below.
Task 4: Forward Traffic to the Proxy with pf
Burp is now ready to gather trafficon port 8080 and forward it to theInternet.However, the mobile device doesn'tknow it should be sending traffic tothe proxy server, so Burp won'tever see it.It is possible to configure the mobiledevice to use a proxy, but not all appswill respect that setting. Some appswill just send traffic past the proxy,defeating our goal of auditing thenetwork traffic. A much better way toaudit apps is to use the Mac firewall'pf' to send all traffic from theBluetooth adapter through the proxy,so the mobile device won't know it'susing a proxy.
To use the 'pf' firewall, we needto create two files: 'pf.rules' and'pf.conf'. For our purposes thesefiles can be very simple.
In the Terminal window, execute thesecommands.
cdProxy (justness) Mac Os X
The 'pwd' command shows the currentworking directory. Make a note of it--youwill need it later.In my case, the directory was/Users/sambowne
Your directory will be different.
In the Terminal window, execute thiscommand:
nano pf.rulesProxy (justness) Mac Os Catalina
The 'nano' text editor opens.In nano, type this line, as shown below.If your interface was namedsomething other than 'bridge0',edit this line to use the correctinterface name.This rule redirects all TCP traffic fromthe Bluetooth connection to Burp,at 127.0.0.1:8080.
rdr pass on bridge0 inet proto tcp from any to any port 1:65535 -> 127.0.0.1 port 8080Press Ctrl+X, Y, Enter to savethe file.
In the Terminal window, execute thiscommand:
nano pf.confAlways cool casino no deposit codes. In the second line, change/Users/sambowne to thecorrect directory you found above.
This configuration file tellspf where to find the rules file.
Proxy (justness) Mac Os Download
rdr-anchor 'forwarding'
load anchor 'forwarding' from '/Users/sambowne/pf.rules'Press Ctrl+X, Y, Enter to savethe file. Adobe reader 2 0 download.
The next step is to test the files.
In the Terminal window, execute thiscommand:
sudo pfctl -vnf pf.confIf your files are correct,you'll see a 'Loading anchor forwarding..'message, followed by the line beginningwith 'rdr pass on bridge',as shown below.
If there are errors in your files,you'll see error messages here.If that happens, use nano to editthe files and correct the errors.
When your files pass this test withouterrors, execute this command tostart pf:
sudo pfctl -evf pf.confTask 5: Testing the Proxy
On your mobile device, in the Webbrowser, go toattack.samsclass.infoThe page should load,as shown below.
On your Mac, in Burp, click the'HTTP History' sub-tab.
You should see traffic tohttp://attack.samsclass.info,as shown below.
Burp is now intercepting and examiningyour mobile device's Internettraffic.There's no way for your mobiledevice to detect this man-in-the-middleattack for the HTTP protocol, which isone of the reasons it's an insecureprotocol.However, Burp won't be ableto get away with that with a properly-implementedHTTPS protocol.
On your mobile device, in the browser,go to samsclass.info --this is a secure page.
You should see a 'Cannot Verify Server Identity'message, as shown below.
Proxy (justness) Mac Os 11
Click Details.
A 'Certificate' box opens, showing thatthis certificate was 'Issued by PortSwigger CA',as shown below.
PortSwigger is the company that madeBurp, and Burp is creating fakecertificates for every website andsigning them. Thebrowser on your mobile device is correctlynotifying you that PortSwigger isnot a trusted CA, indicating thata possibleman-in-the-middle attack is in progress,