Automatic NAT Configuration — Why?

[dhsto]

I was looking around in my router config and under “NAT — Virtual Servers Setup” it has the following information:

Server Name	External Port Start	External Port End	Protocol	Internal Port Start	Internal Port End	Server IP Address	WAN Interface
NoMachine	23960	23960	TCP	4000	4000	192.168.1.10	ppp1.1
NoMachine	24160	24160	TCP	4000	4000	192.168.1.125	ppp1.1
NoMachine	4271	4271	UDP	4271	4271	192.168.1.10	ppp1.1

If I remove these entries they will automatically be repopulated within a few minutes after launching NoMachine. 192.168.1.10 is the computer I’m connecting from and 192.168.1.125 is the computer I’m connecting to.

So why does this happen and doesn’t this configuration mean that it’s directing these public ports to internal ports in my local network?

I really like NoMachine, but I’ve uninstalled it because this happens. Perhaps this is something my router does to try to be helpful? I’m guessing NoMachine must do something to trigger that originally though.

Maybe there’s a setting I can disable to stop this from happening? My router is a SmartRG SR515ac.

Thanks in advance!

[Bilbotine]

Hi dhsto,

Please try to set the EnableUPnP key in /usr/NX/etc/server.cfg from EnableUPnP to none, and let us know if that helps!

Note that UPnP or NAT-PMP is required for automatic port-mapping. Without UPnp, it will be necessary to configure the router manually and open the requested port.

 

[Author]

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