RDP + NLA + VPN: Smartcard authentication fails

  • Inside my company I can login into RDP (NLA is turned on) using my smartcard.
  • Outside my company I’m not able to login into RDP over VPN using my smartcard when I’m using a non-domain PC. I get the following error:

The remote computer that you are trying to connect to requires Network Level Authentication (NLA), but your Windows domain controller cannot be contacted to perform NLA …

  • Outside my company I’m still able to login into RDP over VPN using the username and password when I’m using a non-domain PC.
  • Outside my company I was able to login to RDP (when NLA was turned off) over VPN using my smartcard when I’m using a non-domain PC.
  • Outside my company I’m still able to login into RDP (NLA is turned on) over VPN using the smartcard when I’m using a domain PC.

Answer

Attribution
Source : Link , Question Author : Wollmich , Answer Author : Community

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