By Saroj Kandasamy |


How to Use NX at the SDCC

NoMachine/NX is X Window system acceleration technology that should improve the usability of X based applications over the wide area network. The SDCC NoMachine instance is deployed as a multi-node environment (consisting of Enterprise Terminal Server and Terminal Server Nodes), allows for load balancing and automatic or manual selection of server nodes.

Instructions for OTP Token Generation and NX Client Setup

Users must log in to NX sessions using both their Kerberos password and an OTP token.

For your initial OTP token generation, please follow the instructions in this link below:

 TOTP Enrollment Process: Unified MultiFactor Authentication

 Please do this first step of generating the OTP token, otherwise after entering the right Kerberos password also, will give the error message below:                      

      "Authentication failed, please try again"

Setting up the NoMachine/NX client(through NX client software or web browser):

 a. NX client software method: 

     1. Download and install the NoMachine/NX client software from on your desktop:

             NoMachine Enterprise Client - Select according to the required OS

  1. Open up the NX client software
  2. Click on New Connection and enter the following values for the connection:
    - Protocol: NX
    - Host:, Port: 4000
    - Authentication: Password
    - Network proxy: Don’t use a proxy
    - Name: set any name for the new connection.
  3. Click on Connection 
  4. Enter your SDCC Kerberos credentials
  5. Enter your OTP token. Use the six-digit code from your OTP application (e.g., FreeOTP,Google Authenticator, BNL Duo).
  6. Choose either New Desktop - KDE desktop, GNOME desktop, or create a custom session to use the MATE desktop
  7. Terminal server nodes:
    1. The nxcampus01 server (BNL campus zone) is only for manual selection
    2. The nxterm01 - nxterm04 servers (BNL Science zone) are load-balanced: click "Automatically select a node" to log into one of the servers.(Incase of issues, please update to the latest NoMachine client to view the options.)

b. Create or connect to an NoMachine/NX session through the web browser:

      Follow the same steps as above starting from the Kerberos credentials

Kerberos Login

Kerberos Login


OTP Token

OTP Token

NX Terminal Server Nodes

NX Terminal Server Nodes



If OTP token is not generated yet, will get the below error message

OTP token not set



NoMachine Frequently Asked Questions