Apologies if this has duplicate posted - my profile shows a post as having been made but it's not showing up. Wondering if anyone has any advice to help me forward ports. Set up is: ADSL2+ modem -> ma

Hello Would appreciate any help - I have been trying to set up port forwarding on my home network but without any success. Model of network: ADSL2+ modem -> Main Deco -> 2 other deco connected in mesh