VNC access can be allowed safe?

I recently came home and noticed that my iMac was doing something weird. It seemed that someone was remote control desktop and display something which relates to access to an account of the Wells Fargo Bank via a browser. I pulled the ethernet cable and rebooted the machine, and after a forced restart found that there was a kind of screen remote control application installed on my machine (I made no remarks and can't remember what they called the app) and my backup drive was locked up. Fortunately, the backup drive was only a matter of changing the permissions of the owner. I wiped the drive, reinstalled OS X (El Capitan), retrieved my data from a backup, and everything seems OK.

I want to know is that there is a safe way to allow remote access to my computer or not. I still had ssh and vnc active and enabled for these services on my router, port forwarding so that I can access my machine remotely. I have no idea how my machine was robbed, but I guess it's to guess the vnc password. (The vnc password was also the admin password, which would explain how they managed to install the software). There are vnc on El Capitan vulnerabilities that allow a user access without password? Several times looking for different passwords an effective attack in this case? Allowing the two-factor authorization should take care of password guessing if this is the question.

I would really like to be able to continue to access my machine remotely, but only if this can be done in a more secure manner. Thanks for useful tips on how this can be accomplished.

Set up and use Back to My Mac - Apple Support

For Apple ID - Apple Support two-factor authentication

Tags: Mac OS & System Software

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