We have seen how it is possible to hack a Facebook account with more or less complex techniques, although most of the time there is nothing but a forgetfulness of the user. For example, just connect to Facebook from a friend's PC and forget to log out to leave access on that computer open, which can be used by this friend as he wishes.
Fortunately, Facebook keeps track of all the computers used to connect and allows you to check which devices are connected to your account.
Facebook not only lists the active sessions, but also gives precise indications on the position, on which device, application or browser used and the date of the last active access or login.
Active session means that the login has already taken place and that you can do almost any activity on the account without having to enter the password.
In the case of open unrecognized or forgotten accesses, you can end each active session so that it can no longer be used without a password.
To find out where from where we connected to Facebook, you must open the web browser on your computer, log in to Facebook, go to the Account Settings page, in the " Security " section in the left part of the window.
On the Security Settings page, you will find the " Devices from which you are logged in " line, with a link to open the Edit and see all the devices connected to the account.
In my case I find the Facebook apps for Android and for Windows, the Facebook Messenger app and then access from the browser
Each session can be clicked to see the details with the time, the computer or telephone used and the place from where you connected.
To exit an active session, just click on the " End activity " link.
If you want to better protect access to your account, I refer you to the guide to protect Facebook with security settings
