Update the VPN documentation at https://nb.lsst.io/getting-started/logging-in.html#step-1-use-the-ncsa-vpn-with-cisco-anyconnect according to new standards:
FYI. July 27th new VPN is required, and old VPN will be turned off. Check the status page for details. It's highly to switch to new VPN now and don't wait for 7/27 to switch. New VPN does require DUO (2 factor). Status page has details and how to get it all working.