Definition and setting method of intranet port mapping

The main purpose of the Internet café is to steal QQ number, game account and other sensitive information, as an Internet café administrator must know the common "hang Horse" method, so as to be in the encounter when the Trojan Horse, easy to remove horses.

To hang a horse in an Internet café, you need to embed the Trojan in the server. The way to invade the server is no longer described here. After the invasion of the server, there is a problem before the implantation of the Trojan, which is how to connect the Trojan horse in the server with the external network? To solve this problem, you need to do the port mapping (portmapping) first.

What is port mapping? Port mapping is also called Port forwarding, also known as the virtual server, each product 睥 routers different name.

The port mapping process is like this: your home in a Community 33 building 303 room, your friends to find you, find the community doorway, do not know which floor you live? Ask the security guard at the door, the security guards tell a friend your family's detailed door spleen, so, your friend easily found your home.

In network technology, there are several meanings of ports (English port). Hubs, switches, and routers ' ports refer to interfaces that connect other network devices, such as RJ-45 ports, serial ports, and so on. The port we are talking about here is not the I/O port of the computer hardware, but the concept of software form.

A computer to provide services to the outside, you must open the corresponding port, in the above figure shows the 192.100.100.12 opened the 21st-port of the machine, can already provide FTP services to the extranet-Ji Jing through different ports to provide different services, such as: the Web using 80 ports, FTP uses 21 ports and so on. In this way, through different ports, the computer and the outside world do not interfere with communication. The port we refer to here does not refer to the physical port, but to the port in the TCP/IP protocol, which is the logical port.

The problem with port mapping in Internet cafes is that there is no ADSL or routed login password, so you need to use some tools to break them, for example, using the bit ELF Intranet port mapping tool, which requires the following 橾:

Step 1:XP System to download the BIT Wizard Intranet Port mapping tool and run, in the pop-up as shown in the interface, click the "Next" button to continue.

Step 2: When the interface appears as shown, check the "Ignore ICF Firewall" entry and click the Next button to continue.

Step 3: Click the Next button to continue when you are prompted to find the device.

Step 4: In the image as shown in the interface, the server's IP address and Trojan port input into the gray pigeon default is 8000.