Can’t connect

[jp.kent]

I have installed NoMachine on three computers (1 PC and 2 laptops) on my home network. I have defined the two others on every individual PC. On all three computers, the other two are visible. I have defined the credentials (username and password/PIN) of these computers. When I try to connect from any of them to any other, I get the “Authentication failed” message.

What am I missing?

[katpan]

Hello,

Thank you for sharing the details of your setup! To assist you further, could you please provide the following information:

1. The operating systems running on the three computers.
2. Are you using valid credentials (username and password or PIN) for each specific computer to log in?
3. Can you log in remotely using these credentials through other methods, such as SSH, if available?

This information will help us better understand the issue and suggest appropriate troubleshooting steps.

[jp.kent]

Thank you for offering help.

1. All three are on Windows 11
2.I am using exactly the same credentials with which I am logged on the destination computer
3.I can log remotely as Guest. Which is useless if my computers are not near each other, because Guest requires acceptance on the destination.

[Britgirl]

Hi, the PIN is not accepted when connecting to the desktop remotely. You must use the password that you set up during the creation of your account. See more about this here: https://kb.nomachine.com/AR03S01118, quoting what is written there:

Windows supports the following formats for the account names. They can all be used to log-in by NoMachine:

1) User Principal Name: username@domain

2) Down-Level Logon Name: domain\username

3) Short format name, just ‘username’, domain is implicit.
This is not really a different format, since it is just the Down-Level Logon Name without the domain part.

Ref. https://docs.microsoft.com/en-us/windows/win32/secauthn/user-name-formats

In addition to formats above, there is also the possibility to associate a ‘friendly name’ or nickname to the account. The friendly name, which corresponds to the ‘Full name’ in the account settings, can’t be used to log-in by NoMachine. You need to use instead the name of the account, which is unique and corresponds to the ‘Username’ field in the account settings.

[jp.kent]

Hello Britgirl,

Thanks for your contribution. I don’t think it is relevant to my problem, because I use the logon name of the destination computer, i.e. my_email_address@email.com, which seems to me to be compliant to the theory you enounce. Anyway, as I can connect as guest, there is no security problem.

So the question remains: what prevents me from connecting as myself?

[Britgirl]

Provided the email address you indicated (it was removed for privacy reasons) is the account you see when going to Windows Settings -> Accounts, you can log in. Are you able to log in using the name of the account in short format (Local Account ‘username’ which you can see when going to C:\Users) and password?

Logs from any of the Windows computers would be useful after having tried to connect and authenticate using your regular account credentials (the email you mentioned and password) as per the instructions here: https://kb.nomachine.com/DT07S00243. Send them to forum[at]nomachine[dot]com. Please use the title of this topic as the subject of your email. Thanks!

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