Overview:
SLAC's VPN uses posture checking to enforce that antivirus software is installed and that antivirus updates are current. In addition, Cisco's AnyConnect Secure Mobility Client VPN software must be used so that the status of antivirus can be reported to the SLAC VPN ASA's.
SLAC has some pages on installing antivirus and AnyConnect, but they are a bit scatter. This document is an attempt at providing a streamlined recipe.
This process was tested on a MacBook Air running the Elementary distribution version 5.1 (based on the Ubuntu Linux 18.04 LTS distribution).
Ethernet and Wireless Networking
The MacBook Air has no built-in Ethernet, only wireless. Unfortunately, the default installation of many Linux distributions don't have the correct wireless driver, so the user is left with no way to connect to the network after installation. I was unable to get an Apple Thunderbolt Ethernet adapter to work, but a Linksys USB adapter (model USB3GIGV1) was recognized. Thus, I could get networking up with Ethernet to install OS updates and download wireless drivers.
To install wireless drivers, you need to know which chipset is being used. In my case, it was a Broadcom BCM4360 802.11ac adapter. This page on Broadcom Wifi on Ubuntu provided some useful documentation.