Hello,
Welcome to Teltonika Networks Community !
Just needed a small clarification, you need to access 192.168.1.10:80 using the port 8081 from outside the router ?
Or you need to access 192.168.1.10:80 using 192.168.1.10:8081 in the local network ?
Just so that i can help you better.
Regards,
Clive Pinto