Hello, Anyone familiar with NoMachine, I do not get an external IP adres when i turn the OpenSUSE firewall on. I do get an external IP adress when i turn it off. My router supports UPnP. Has anyone an idea how to configure the openSUSE firewall so it allows NX sessions over the internet??
Roland
This post likely answers your question…
https://forums.opensuse.org/showthread.php/493332-Nomachine-V4-cannot-connect-through-firewall?p=2607713#post2607713
sorry no succes. i forgot to mention on my router is also an firewall running
Well, it’s important to tell the whole story. Hopefully, you’ll know who to administer your particular router model 
https://www.nomachine.com/AR11L00827
This may be relevant…
IMPORTANT
For point 4), if the router doesn’t accept UPnP or NAT-PMP commands, it will be necessary to configure it manually through its administrative interface.
If you are using NoMachine (free), you will need to open port 4000 on the router and map it to the public IP address of your NoMachine (server ) host.
Ports to be opened on the router and mapped to the public IP address of the server host are:
4000 for connections using the NX protocol.
22 or 4022 on Windows for connections using the SSH protocol.
4080 and 4443 for web connections (available with the Cloud Server only).
Note also that the default port values can be changed from the NoMachine GUI -> Connections (or Server status) -> Connections preferences (or Server preferences) -> Services panel.