is there any way to set the external ip for fcraft by yourself?

i have a dedicated server and virtual servers with another ip, but fCraft seems to automatically detect my dedicated IP instead of the virtual machine's ip where its running. :/

The problem of it all is, that classicube play link is corrupt.

Is there any chance to set the external ip by yourself?

As alternative, can i create my own play link manually?

(Automerge)
<ConfigKey key="IP" value="192.168.0.6" default="0.0.0.0" />

I cant enter my external ip there, well if i do it, its still not working.