Hello to all Linux Maniacs!!! I'm back home, play with my two daughters & new born son. Yeah , as you understand no time for Linux experimentation. Good thing, back home internet is more than ok, instead of vessel. So playing with SSH & SFTP the easy part , within LAN was pretty easy. The difficult part was to achieved connection form outside world. Thousand of tutorials in web were not that enough illustrative. I have a Mac home (yes, I know but is also a Unix machine ) & I decided to make it a server. I'm using my Mint as a client trying to succed a connection with my server. I follow the below instructions (adapted for a Mac) https://forums.linuxmint.com/viewtopic.php?f=42&t=13695 Of course I made a static IP for my server and port forwarding in my router. what ever I tried was unsuccessful. Finally I tried this Code: ssh [email protected]_ip Using router IP instead of machine IP succeed a connection. Problem is that router IP is not static & ISP probably is charging for a static IP, moreover I don't know if this way is secured. That's it folks, I'm waiting your for further investigation.