MAG boxes has no telnet, and closed ssh access by default.
https://wiki.infomir.eu/doku.php/en
Also you TV provider may close ssh access, change ssh port, change password, etc if they use custom firmware. If it not prevent, you can flash public firmware version with opened ssh.
public firmware: http://soft.infomir.com.ua/
how to update firmware: https://wiki.infomir.eu/doku.php/en