The remote host refused to establish a network connection on port 4000

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  • #38392
    jebs
    Participant

    Hi all,

     

    I’ve deployed NoMachine quite a few times with no issues, however I’m starting to run into this when connecting to this new facility. I’m connected via IPSEC VPN, verified I have access to this subnet and can ping the intended workstation, however I can’t seem to get a connection.

    Client – Windows 10 Pro, NX Version 7.9.2

    Host – OS 10.14.6 Mojave, NX Version 7.9.2.1

    Do you folks see anything that stands out as an issue? I appreciate the feedback.

    Thanks!

     

    Info: Starting NoMachine version 7.9.2.

    Info: Loading settings from ‘C:/Users/EXPERIMENTAL/.nx\config\player.cfg’.

    Info: Loaded translation files for ‘English’.

    18372 2816 16:18:14 858.660 Main: Creating the client session.

    18372 2816 16:18:14 858.660 ClientSession: Initializing session at 0x00cfd540.

    18372 2816 16:18:14 931.663 ClientSession: Initialized session at 0x00cfd540.

    18372 2816 16:18:14 935.661 ClientSession: Starting session at 0x00cfd540.

    18372 2816 16:18:14 940.660 ClientSession: Going to start session ‘C:\Users\EXPERIMENTAL\Documents\NoMachine\graphics01.nxs’.

    18372 2816 16:18:14 955.660 ClientThread: Creating new thread.

    18372 2816 16:18:14 960.660 Connection: Initializing connection at 0x0574b850.

    18372 2816 16:18:14 961.661 Connection: Initialized connection at 0x0574b850.

    18372 2816 16:18:14 962.659 Connection: Starting connection at 0x0574b850.

    18372 2816 16:18:14 962.659 ClientDaemonConnector: Starting a new connection to host ‘10.229.107.79’ on port ‘4000’.

    18372 2816 16:18:14 963.661 Connection: Started connection at 0x0574b850.

    18372 2816 16:18:14 977.660 ClientSession: Started session at 0x00cfd540.

    Info: Slave server running with pid 23492.

    Info: Listening to slave connections on port 53286.

    18372 2816 16:18:14 990.659 Main: Entering the GUI event loop.

    18372 2816 16:18:24 307.660 Connection: Connection at 0x0574b850 failed.

    18372 2816 16:18:24 307.660 ClientSession: Runnable at 0x0574b850 caused the session at 0x00cfd540 to fail.

    18372 2816 16:18:24 307.660 ClientSession: Failing reason is ‘The remote host ‘10.229.107.79’ refused to establish a network connection on port ‘4000’. Please verify that NoMachine is correctly installed and listening on the port where you are trying to connect, and that incoming traffic is not being blocked by a firewall or NAT.’.

    18372 2816 16:18:24 318.659 ClientSession: Stopping session at 0x00cfd540.

    Info: Slave server running with pid 20180.

    Info: Listening to slave connections on port 26495.

    18372 2816 16:18:24 351.661 Connection: Stopping connection at 0x0574b850.

    18372 2816 16:18:24 351.661 ClientDaemonConnector: Stopping the current connection.

    18372 2816 16:18:24 351.661 Connection: Stopped connection at 0x0574b850.

    18372 2816 16:18:24 367.660 ClientSession: Stopped session at 0x00cfd540.

     

    #38437
    Britgirl
    Keymaster

    Are the IP address and port number correct? The message indicates that the IP address is not available from your network. Could it be that IPSEC VPN is blocking NoMachine? Can you try disabling VPN as a test to verify if problem is in the VPN configuration?

    #38447
    jebs
    Participant

    IP addresses and port numbers are correct, port numbers never changed from standard and IP address was both confirmed  / pinged to ensure communication. The VPN gives us access to specific subnets, bypassing any port forwarding rules and acting as if it’s on the local network. It’s the same configuration I’ve done before, albeit with PCs and SSL VPN before I realized how bad the performance hit can be with that method.

    I’m looking into adding another system to that network to test with and will respond with whatever I find at that time.

    #38457
    Britgirl
    Keymaster

    Let us know 🙂

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