Device for blocking hacking and method therefor

The present invention provides a device for blocking hacking and a method therefor. That is, according to the present invention: when access is attempted by a terminal, an IP address of the terminal attempting the access is identified, and the access of the terminal is blocked if the IP address is included in a preconfigured blacklist; if the IP address is not included in the blacklist, a destination port of the terminal is identified; in response to the identified destination port of the terminal, the terminal is provided with a screen including an alert message and an input form for inputting an ID and a password, which is a dummy process; when the terminal transmits an ID and a password, it is determined, depending on the number of transmissions, that the terminal has attempted the access for hacking purposes, and the access of the terminal is thus blocked.