Irek

[Irek]

Hello buzz,

this is a known issue and a fix should be in the next release.

https://www.nomachine.com/TR12R09995

[Irek]

Hello bsper2,

unfortunately there is no other way.

It’s a client side setting, the only option is to change the CFG of all clients, wherever they are.

Maybe the best thing for you could be distributing a CFG for all users, so they could copy it in $HOME/.nx/config
on their side.
Please also remember to change that setting on server side for each and every user in their “$HOME/.nx/config” directory.

[Irek]

Hello bsper2,

I’ve logged into all five of our servers running NoMachine and confirmed that the “Don’t show other computers on the network” player preferences setting was already unchecked. Also verified all servers had the “Advertise this compute on the local network” setting unchecked.

It’s correct that the key “Advertise this compute on the local network” is unchecked.

However, another key “Don’t show other computers on the network” should be checked.

So please change that to be checked (like in the screenshot 2).

To stop all MDNS traffic, you should have on player’s services panel on each host like screenshot 1,
and on the Player preferences like screenshot 2.

Are all your players and servers set to this?

The important thing is that you apply them an all machines of your network on which you don’t want to have mDNS.

Attachments:

1. 

   nxclient.png
   

2. 

   nxplayer.png
   

[Irek]

Hello bsper2,

We could not reproduce this issue in your evironment.

Please gather logs and send them to us. Please follow the article on how to enable debug:

https://www.nomachine.com/DT10O00163 (“How to gather debug logs for support requests”)

Then please do:

sudo /etc/NX/nxserver --restart

and reproduce the problem. Then please gather the logs either manually or by executing:

sudo /etc/NX/nxserver --debug --collect

Please send the logs to forum[at]nomachine[dot]com using the title of this forum’s thread as the mail’s subject.

[Irek]

Hello bsper2,

I assume ‘10.156.1.13’ is the server host where you had disabled mDNS broadcasting. Those logs, suggest it is mDNS discovery.

To disable discovery on clients, select Player preferences -> Privacy -> Don’t show other computers on the network.

The important thing is that you apply them an all machines of your network on which you dont want to have mDNS.

[Irek]

Hello bsper2,

Please make sure that you have restarted nxserver after disabling broadcasting by setting configuration key in server.cfg:

EnableNetworkBroadcast 0

Restarting nxserver after such change is required.
Please do the following steps on all hosts where you want to disable broadcast feature.

In case restarting nxserver didnt help, please refer to an article on how to enable debug:

How to gather debug logs for support requests

1 .Enable debug on the server machine and then do:

sudo /etc/NX/nxserver --restart

Then please check if you reproduced issue. Then please gather logs either manually or by executing:

sudo /etc/NX/nxserver --debug --collect

2. Please send to us server.cfg file.

3. Can you please tell us how do exactly you check that

Please send the logs and server.cfg file to forum[at]nomachine[dot]com using the title of this forum’s thread as the mail’s subject.

About second suggestion to disable broadcasting from GUI by uncheck the box “Advertize this computer…” in the player’s services,
looks like you have set key ‘EnableServerPreferences’ to 0 in /usr/NX/etc/node.cfg.

Please make sure that this key is set to ‘1’ and restart nxserver to be able to see “Server Preferences”

# grep EnableServerPreferences /usr/NX/etc/node.cfg
EnableServerPreferences 1

[Irek]

Hello boospy

This is a known issue. Please consult the Trouble Report, there is also a workaround available.

“The NoMachine web server doesn’t start on Ubuntu 20.04 after changing the ports”
https://www.nomachine.com/TR06R09730

Additionally there is an Article which may be helpful:

“How to change default ports for nxhtd”
https://www.nomachine.com/AR12Q01065

[Irek]

Hello,

If the NoMachine network daemon (nxd) is configured on the server to listen on a different port,
it’s also necessary to update the client.crt file, on Linux /var/NX/nxhtd/.nx/config/client.crt, to have:

Host:localhost 5001
-----BEGIN CERTIFICATE-----
(...)
-----END CERTIFICATE-----
Host:127.0.0.1 5001
-----BEGIN CERTIFICATE-----
(...)
-----END CERTIFICATE-----

You can find whole instruction in here:
https://www.nomachine.com/AR06N00888

[Irek]

Hello (pasting some info from your email reply)

1 “both the machines are connected to different routers, now also on the Linux end there is a new router.”

– did you checked that on both UPnP is enabled?
– what is the new router name/model?

2 “However, one’s a laptop, so I can move it to the other location —
when I have them both on the same home network, the
connection works fine.”

And what about UPnP on that laptop in the new location?
As I understood Windows is installed on this Laptop, and in its base location
UPnP is working.

When you move this laptop to the place where PC with Linux is located
does UPnP works or now it doesnt?

3 Just for a test, could you disable/turn off all other network interfaces on the Linux machine
and leave only WiFi or cable connection alive to this router. And then please call as administrator in terminal

/etc/NX/nxserver --restart

/etc/NX/nxserver --upnpstatus

if still doesnt show, wait a while and run:

/etc/NX/nxserver --upnpmap

Please send all the output to forum[at]nomachine[dot]com making sure to reference the topic.

[Irek]

Hello,

we would need some more information

1 Could you please send to use all configuration files *.cfg from :

# /usr/NX/etc/

If you don’t show us the htd.cfg, it’s hard for us to advise appropriately.

2 Please execute this command in terminal:

# /etc/NX/nxserver --version

3 From server.cfg I can tell 2 things

3.1 HTTP is disabled

#
# Specify how clients will have to contact the node, by default by
# the NX service. To allow for multiple methods, specify them in a
# comma-separated list. Supported methods are: NX, SSH and HTTP.
#
ClientConnectionMethods NX,SSH

to enable you have to add HTTP:

ClientConnectionMethods NX,SSH,HTTP

Restart of nxserver is required.

3.2 it looks like this is old version maybe v5, if thats true is this possible to update to latest v6?

4 We would ned alos to see all logs.
Instructions about debug and collecting logs you can find there: https://www.nomachine.com/AR07K00677

Please send them to forum[at]nomachine[dot]com making sure to reference the topic.

[Irek]

Hello,

can you please describe what are you trying to do by removing ssl certificates,
is it because you want to have only HTTP or both HTTP and HTTPs instead of only having HTTPs?

Can you also send to us htd.cfg and server.cfg configuration files.

Please send all the info to forum[at]nomachine[dot]com making sure to reference the topic.

[Irek]

we would need some more information:

1 When did you notice that UPnP stopped working ? Maybe after a software / OS update?

2 Can you describe the network infrastructure

– router model / version
– is there more than one router / network interfaces on which Linux machine is connected?
– is the computer directly connected to router or is there a cascade or repeater between them?
– are both machines [ physical machines or virtual [vbox/vmware] ? ] connected to the same router, both over wifi/lan or mixed?

3 Can you please execute those commands:

– on Linux machine in terminal:

nmcli device status

route -n

ifconfig -a

– on Windows in cmd:

ipconfig /all

Please send all the output to forum[at]nomachine[dot]com making sure to reference the topic.

[Irek]

Hello Lars,

not sure if you’re referring to the certificate for the web server. If so, edit the nxhtd configuration file to point to the new certificate.

If, on the other hand, you’re referring to the certificate for NX authentication, it still has to be implemented

[Irek]

Hello pureobscure,

currently for a Web session you can use self-signed certificates, as explained in:

https://www.nomachine.com/DT03O00127#3

CA certificates are effectively not supported yet.

[Irek]

Hello Stan,

NoMachine retrieves the public IP and maps the port automatically when the router supports UPnP or NAT-PMP port mapping.

Information how to enable UPnP port mapping on nxserver is available here: https://www.nomachine.com/AR11L00827. Just set

EnableUPnP NX

in the

/usr/NX/etc/server.cfg

.

When IP will change you will probably not be able to connect to the server. It’s now been queued up for fixing and you can see it here: https://www.nomachine.com/TR01P08354. You can use the ‘notify me’ tool to find out when a fix has been released.

However there is a way to handle this, and make it works:
when IP will change you can use script or by hand call those 2 commands as administrator / root user:

# /etc/NX/nxserver –upnpunmap
# /etc/NX/nxserver –upnpmap

If UPnP is enabled and works on router that server machine is connected you will see as the ouput of second command external IP and Port.

Port may not changed, but those to commands called exactly in that order, will allows you to connect after IP changed.

To get only information about port mapping you can call:

# /etc/NX/nxserver –upnpstatus

the ouput will be similar to:

# /etc/NX/nxserver –upnpstatus
Local IP 192.168.1.2
Gateway IP 192.168.1.1
External IP 151.1.192.128
NX port 4000 mapped to: 151.1.192.128:29382

[Author]

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