I'm trying to set up port forwarding on my Airtel Nokia router. I’ve configured the settings, but when I check using yougetsignal.com it shows the port as closed. I successfully did port forwarding a few years ago on the same network without any issues, so I'm not sure what's going wrong this time. Some forum posts suggest that I might need a static IP address for it to work. Is that true? Is there any way to port forward without getting a static IP? Would really appreciate any guidance or suggestions. Thanks in advance!