OSX update and Decryption

Reply
L4 Transporter

OSX update and Decryption

I've installed our Root CA cert in the "System" keychain, and have it marked as trusted.  I can successfully decrypt web traffic from a MAC running Mojave.  No problems there. 

 

The problem comes in when I try updating the OSX or even check for updates from the CLI.   

 

When I run "softwareupdate -l"  in terminal, In the logs on the firewall it appears to be coming through as web browsing app, and getting decrypted.  

 

I ran a packet capture, and it shows the client is resetting the connection after succesffuly going out to swscan.apple.com, which is not whitelisted for decryption exclusions.  Has anyone run into issues when trying to decrypt on OSX with a trusted root cert, while trying to update the operating system itself?

 

Guessing adding these domains to decryption exclusion is going to fix this?

Tags (3)
L7 Applicator

Re: OSX update and Decryption

@Sec101,

Whitelist the following:

  • gg.apple.com
  • gnf-mdn.apple.com
  • gnf-mr.apple.com
  • gs.apple.com
  • ig.apple.com
  • mesu.apple.com
  • skl.apple.com
  • swcdn.apple.com
  • swdist.apple.com
  • swdownload.apple.com
  • swpost.apple.com
  • swscan.apple.com
  • updates-http.cdn-apple.com
  • updates.cdn-apple.com
  • xp.apple.com

That should take care of the software updates and allow your clients to actually update successfully. 

L4 Transporter

Re: OSX update and Decryption

Perfect!  As always, an excellent reply!  Thank you.  When you say whitelist- you mean exclude decryption right?

L7 Applicator

Re: OSX update and Decryption

Correct. Exclude those domains from decryption and your clients should be able to check for and download updates again. 

Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the Live Community as a whole!

The Live Community thanks you for your participation!