The problem
On a debug server, we need to test the code and to know were and which error occour.
ssh ServerIP -l Username -i SSHKEYS -p 22
If you configure a VPN for Fritz!Box as described on the AVM website, and you try to connect to it using a mobile internet connection (at least using Swisscom as provider) it does not work.
You can connect but you are not able to access any machine on the remote network.
I do not know why but the account settings are not saved inside the .pst files so each time you install a brand new machine, you have to create again all your mail accounts.
If you have many account this can be really boring.