Yesterday I made a Nas Server on Raspberry Pi and on the local network it's works fine and the SSH connection too but as soon as I try to connect to the Raspberry through Putty from an outside network it's not working.
I set a static IP for Raspberry and I port forwarded port 22 to the static IP but in the port checker it' s still closed.
I checked the ports on the Raspberry too and it says: "Listen" to port 22.
I have a ZTE f608 router.
I don't know what to do. If you guys have any ideas please share with me. Thank you.