How to change the listening port of nxagent?

[sharajava]

In my environment, the port 7016 is used by nxagent.

bash-3.2$ netstat -atnp | grep 7016

(Not all processes could be identified, non-owned process info

will not be shown, you would have to be root to see it all.)

tcp        0      0 0.0.0.0:7016                0.0.0.0:*                   LISTEN      31602/nxagent

tcp        0      0 :::7016                     :::*                        LISTEN      31602/nxagent

 

I want to change it. How to do it? Thanks.

[Britgirl]

Look at this post here: https://www.nomachine.com/forums/forums/topic/nxagent-is-listening-on-port-70017002#post-319

[snejok]

Hello, all!

Why nxnode opens these ports?

# netstat -anlpt |grep LISTEN |grep nxnode | sort

tcp        0      0 0.0.0.0:7001                0.0.0.0:*                   LISTEN      20758/nxnode.bin

tcp        0      0 0.0.0.0:7002                0.0.0.0:*                   LISTEN      26853/nxnode.bin

tcp        0      0 0.0.0.0:7003                0.0.0.0:*                   LISTEN      16466/nxnode.bin

tcp        0      0 0.0.0.0:7004                0.0.0.0:*                   LISTEN      21998/nxnode.bin

# nmap <IP>

Host is up (0.0033s latency).

Not shown: 988 closed ports

PORT     STATE    SERVICE

22/tcp   open     ssh

113/tcp  filtered auth

631/tcp  open     ipp

4000/tcp open     remoteanything

7001/tcp open     afs3-callback

7002/tcp open     afs3-prserver

7004/tcp open     afs3-kaserver

7007/tcp open     afs3-bos

7019/tcp open     unknown

7025/tcp open     unknown

7070/tcp open     realserver

7100/tcp open     font-service

 

# telnet <IP> 7002

Trying <IP>…

Connected to <IP>.

Escape character is ‘^]’.

^]

telnet> quit

Connection closed.

 

[graywolf]

tcp        0      0 0.0.0.0:7001                0.0.0.0:*                   LISTEN      20758/nxnode.bin

tcp        0      0 0.0.0.0:7002                0.0.0.0:*                   LISTEN      26853/nxnode.bin

tcp        0      0 0.0.0.0:7003                0.0.0.0:*                   LISTEN      16466/nxnode.bin

tcp        0      0 0.0.0.0:7004                0.0.0.0:*                   LISTEN      21998/nxnode.bin

Those ports are the TCP X11 display ports. You have four node processes. Each node is listening on a different X11 display.

In X11, the port number and the display have a fixed offset of 6000, that is TCP Port = Display Number + 6000.

So that, those nodes are listening on X11 displays :1001, :1002, :1003, :1004. NoMachine is set to begin display count at 1001. New node processes will get progressive numbers.

[tired]

Is there any way to reconfigure this behavior, perhaps the base port?  I have a port conflict with another service that I have to run on 7001, which is kind of a deal breaker.

[tired]

Solved.  edit /usr/NX/etc/server.cfg

Uncomment DisplayBase, and set to something other than 1001.

(e.g. DisplayBase = 1004)

now nxnode display ports are 7004, etc., avoiding 7001

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