First, I apologize for my English expression (i'm German) and my english is not so good as well.
I have an RUT230 Router.
Portforwarding works allready from LTE-IP and port 123 (example) to internal LAN IP-address port 123.
Now i need to include the other way from internal LAN IP-address and port 456 to LTE-IP port 456.
Where an How can i do these configuration?
Thanks in advance.