ERR_CONNECTION_REFUSED

Hi, i try to create a matrix server, it work well, i can acces it with my localip and with the ZeroTrust tunnel i create on cloudflare, but only when i am not connected to the same network has my server like if I am at home and connected to my wifi and i go to 192.168.1.17:8008, everything work if I am not connected to my wifi and i go to matrix.shamiiow.com it work but if I'm connected to my wifi and go to matrix.shamiiow.com i have an error