When windows XP user wants to remote desktop RDP into a more secured windows server such as Windows server 2008, he may be rejected because his windows xp machine does not have network level authentication.
The following short article show how to do that, given he installed SP3 service pack 3. Repost from source credit: https://support.soundenterprises.com/?_m=knowledgebase&_a=viewarticle&kbarticleid=221
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When connecting to a Windows 2008 Server using remote desktop from a Windows XP client running service pack 2 or earlier, you get the following error message:
The remote computer requires Network Level Authentication, which your computer does not support.
To enable NLA in XP machines; first install XP SP3, then edit the registry settings on the XP client machine to allow NLA
• Configure Network Level Authentication
1. Click Start, click Run, type regedit, and then press ENTER.
2. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
3. In the details pane, right-click Security Packages, and then click Modify.
4. In the Value data box, type tspkg. Leave any data that is specific to other SSPs, and then click OK.
5. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders
6. In the details pane, right-click SecurityProviders, and then click Modify.
7. In the Value data box, type credssp.dll. Leave any data that is specific to other SSPs, and then click OK.
8. Exit Registry Editor.
9. Restart the computer.
Source Credit:
https://support.soundenterprises.com/?_m=knowledgebase&_a=viewarticle&kbarticleid=221
