Cannot use authentication with SSH/SSL key – free version

[Babok]

Hello, i am beginner to free NoMachine – Version 5.1.62, and trying to configure one of the authentification methods through NX protocol :

– Authentication with SSH key.

– Authentication with SSL Certificate File and SSL Certificate Key.

Since the ssh protocol is disable in the free version, I don’t know if those functions are working too.

The password based authentication is working but i am trying to find a tutorial how to set up with keys.

I installed the server on Linux and the client on Windows 10.

Here the things I did:

Set the EnableNXClientAuthentication 1 on server.cfg

Copied /etc/keys/host/nx_host_rsa_key.crt and /etc/keys/host/nx_host_rsa_key to client folder C:\ProgramData\NoMachine\nxhtd\.nx\config\

 

Then I launched GUI client and configured it to use private key nx_host_rsa_key.crt.

After that, I got time out after few minutes trying to connect on server.

I didn’t generated any custom SSL Keys, I took them from the NoMachine installation.

 

Any help would be appreciated.

 

 

 

[reza]

Please follow article about setting up key based authentication.

https://www.nomachine.com/AR02L00785

 

[Babok]

I also just generated client certificate (nx_client_rsa_key.crt) to the store file on the server (server.crt)

# echo “Host:localhost” > /var/NX/.nx/config/server.crt

# cat /usr/NX/etc/keys/host/nx_client_rsa_key.crt >> /var/NX/nx/.nx/config/server.crt

# echo “Host:127.0.0.1” >> /var/NX/.nx/config/server.crt

# cat /usr/NX/etc/keys/host/nx_client_rsa_key.crt>> /var/NX/nx/.nx/config/server.crt

Both entries for Host:localhost and Host:127.0.0.1 in server.crt look like:

Host:localhost

—–BEGIN CERTIFICATE

—– MIIC9zCCAd+gAwIBAgIRAP4YLqSxLm9xey/k41vmu+cwDQYJKoZIhvcNAQEFBQAw (……)

—–END CERTIFICATE

—– Host:127.0.0.1

—–BEGIN CERTIFICATE

—– MIIC9zCCAd+gAwIBAgIRAP4YLqSxLm9xey/k41vmu+cwDQYJKoZIhvcNAQEFBQAw (….)

—–END CERTIFICATE—–

 

And same issue

[Babok]

if I modify the server.cfg (/var/NX/nx/.nx/config/server.crt)

Host: <IP>

—–BEGIN CERTIFICATE

—– …

—–END CERTIFICATE

—– Host:

—–BEGIN CERTIFICATE

—– …

—–END CERTIFICATE

—– … Where <IP> is the IP address of the client.

i have an answer from the server:

Cannot accept public keys

• This reply was modified 7 years, 11 months ago by Britgirl.
• This reply was modified 7 years, 11 months ago by Babok.
• This reply was modified 7 years, 11 months ago by Babok.

[Britgirl]

Can you confirm that you followed Reza’s recommendation to check the article?

[Babok]

First I tried to make use of Authentication with SSL Certificate File and SSL Certificate Key with article https://www.nomachine.com/AR10M00866.

Because I wasn’t sure SSH key would be enable on free version but it is, I will try the Reza’s recommendation .

[Babok]

Thanks for the link, i will try to use ssh keys with your link.

I read this article https://www.nomachine.com/AR10M00866 but doesn’t work either with ssl keys with the free version.

I managed to set a ssh tunnel with putty client (windows port 4003) to linux server (port 4000). And i can connect to NX server with this connection settings:

connection settings: Protocol: NX Host: localhost Port: 4003 Authentication method: Password Username: user Password: ***

The issue is keys authentification (ssh/ssl)

[Babok]

Here some good news:

– On my ssh server, i created private and public keys, and tested until it works.

– After that, i tried Reza’s recommendation, and it works well ! i can connect by using NX protocol with SSH keys on free version and without using any ssh tunnel.

Maybe I will try with SSL Certificate File and SSL Certificate Key….

But here my last questions

– Can I only allow key authentification on nxserver as on ssh server ? I want to disable password authentication.

– Do you have any jail config and jail filter for NoMachine to use with fail2ban ? I would like to protect my server against attacks.

Thanks for your help.

[Babok]

I found my answer on server.cfg;

Modify the field:

#AcceptedAuthenticationMethods all

To:

AcceptedAuthenticationMethods NX-private-key

[Britgirl]

Fail2ban support is on our roadmap. You can view the Feature Request here:

https://www.nomachine.com/FR01O03298

[Author]

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