Question

Do you understand the backdoor of the port?

Answer 1

A backdoor is a program or a set of related programs that a hacker installs on the victim computer to allow access to the system at a later time. A backdoor’s goal is to remove the evidence of initial entry from the systems log. But a “nice” backdoor will allow a hacker to retain access to a machine it has penetrated even if the intrusion factor has in the meantime been detected by the system administrator. Resetting passwords, changing disk access permissions or fixing original security holes in the hope of remedying the problem may not help.