The advantages of Network Level Authentication are: It requires fewer remote computer resources initially. The GPO setting is located at: Computer/Policies/Windows Settings/Local Policies/Security Options/Network Security: LAN Manager authentication level. Note that there could be existing group policy that sets the LMCompatibilityLevel value, so you may need to review your existing GPOs to ensure that the right value is set. Microsoft Disable NLA, Hardening, Hardening Windows Server, Nla. In addition to improving authentication, NLA also helps protect the remote computer from malicious users and software by completing user authentication before a full RDP connection is established. Source: Based on a VMware Knowledge Base article Establishing a RDP connection with a Windows 8.1 Desktop from Horizon View Client for … 4] Click ‘Apply’ and then click ‘OK’ or hit the ‘Enter’ button to disable Network Level Authentication. The last security recommendation we have is to change the default port that Remote Desktop listens on. Solution Enable Network Level Authentication (NLA) on the remote RDP server. 1. Go to your control panel-> System and Security; Allow remote access; Enable or disable Network Level Authentication-> OK; Done! The Network security: LAN Manager authentication level setting determines which challenge/response authentication protocol is used for network logons. Close Group Policy Editor and reboot the machine for changes to take effect. While working on domain-controlled systems, upon trying to remotely access computers, users have reported 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. Next, go to the remote tab and uncheck the checkbox for the “Allow connections only from computers running Remote Desktop with Network Level Authentication (recommended)” option. This choice affects the authentication protocol level that clients use, the session security level that the computers negotiate, and the authentication level that servers accept. Configure Network Level Authentication. Require user authentication for remote connections by using Network Level Authentication – Set this to Enabled. 2. It uses the new Security Support Provider, CredSSP, which is available through SSPI since Windows Vista. enable network level authentication gpo, Change "Require user authentication for remote connections by using Network Level Authentication" to Disabled. Close out of GPMC. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa 3. Set Require user authentication for remote connections by using Network Level Authentication to Enable. 5] Reboot your device and check if you can connect devices remotely. To enable Network Level Authentication (NLA) through Group Policies, you must enable this policy : Require user authentication for remote connections by using Network Level Authentication. Once those changes have been made, you can close the Local Group Policy Editor. How to disable / enable Network Level Authentication (NLA) for RDP. If you are an administrator on the remote computer, you … Network Level Authentication was introduced in RDP 6.0 and supported initially in Windows Vista. There aren’t any more settings to configure. Disabling and enabling NLA is quite easy. In the details pane, right-click Security Packages, and then click Modify. Last but certainly not least, we need to apply the newly created GPO to an Organizational Unit so it actually works. 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