{macOS VPN (L2TP-IPSec-PSK) Server.} Native macOS VPN Server L2TP-IPSec-PSK configuration using vpnd. This configuration is based upon macOS Server.app's VPN server prior to its deprecation in Server.app version 5.7. See `man 5 vpnd` and /Library/Preferences/SystemConfiguration/com.apple.RemoteAccessServers.plist for details.

WWW: https://opensource.apple.com/source/ppp/ppp-838/Helpers/vpnd/vpnd.5.auto.html
