No external IP on free install Ubuntu 16.04

[mgibbons]

Hello,

I’ve installed NoMachine_5.3.12_10_amd64.deb. The NoMachine server displays nx://192.168.200.99 and ssh://192.168.200.99 but no external connection

I’m behind a NAT with my internal ip being 192.168.200.99. Connections across my internal LAN work flawlessly. The NoMachine server has configured my router as connection to ip 192.168.200.101

1 NoMachine 24004 TCP 4000 192.168.200.101 Enabled

Why ip 192.168.200.101? I’ve restarted the server several times to no avail. I’ve also read the doc about NAT Installation.

I’ve read everything relevant I can find on these forums and the larger internet but have not been able to resolve this. If I try to connect to my external ip nx://xxx.xxx.xxx.133 I get connection refused.

How can I get an external connection working?

Thank you

[kroy]

You have double NAT networking, so NoMachine has to go through two routers. The first one which is facing the internet, and the second, which is on your local network. You need to set up separate port forwarding rules on each device.

Why ip 192.168.200.101?

It looks that is your second router IP and port 24004 is set for UPnP connection. To connect to the machine from external network you need to configure first router. In your case open 24004 port for 192.168.200.101. Now connection to external IP with port 24004 should work.

[mgibbons]

I’m wondering why you say I have double NAT networking. I have only 1 router and no firewall on my Ubuntu desktop.

[Tom]

Hello,
We thought about two routers, because you wrote about IP 192.168.200.101 and another IP x.x.x.133

.

Now we understand that your NoMachine Server ( computer you want to connect to ) IP is  192.168.200.99. Router has internal IP 192.168.200.101 and you have external IP x.x.x.133.

If this line “1 NoMachine 24004 TCP 4000 192.168.200.101 Enabled” show me set forwarding port 24004 on your router please change this to IP  192.168.200.99.  Router must forward traffic on port 24004 to your computer IP.

Please remember that on computer with you want connect you must set in connection IP x.x.x.133 and port 24004.

Regards
Tom

[mgibbons]

What I was trying to say in my first post is that it was NoMachine that set the router to forward to IP 192.168.200.101 on installation despite my internal ip being IP 192.168.200.99. This seems like a bug in NoMachine.

[kroy]

Please enable debug (uncomment and set SessionLogLevel 7 in the /usr/NX/etc/server.cfg), restart nxserver (sudo /usr/NX/bin/nxserver --restart) tar logs (it’s in the /usr/NX/var/log/) and send them to forum[at]nomachine[dot]com.

Send also output of the commands: sudo /usr/NX/bin/nxserver --upnpstatus and ifconfig -a.

[Author]

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