The UDM-Pro can act as a radius server. We can utilize this to authenticate VPN users.

  • Log into the UDM-Pro using a browser
  • Navigate to Settings > Advanced Features > Radius
  • Edit the default
    • Enable the radius server
    • Enter a secret phrase to be used for the L2TP connections
    • Click Create new radius user
      • Tunnel Type = 3 - Layer Two Tunneling Protocol (L2TP)
      • Tunnel Medium Type = 1 - IPv4 (IP version 4)