What is a port scanning tool? What is the use of port scanning tools

Nowadays, the network is very developed , Almost everywhere , The development of the network has brought a lot of convenience to people , At the same time, it also brings more information and entertainment to people , The computer can be used as the terminal of the network , Now it has become an indispensable thing in the family , But everything has its advantages and disadvantages , While the network is powerful, the virus is becoming more and more powerful , And for these things , Many people say that it can be solved directly through the port scanning tool , But what exactly is a port scanning tool ？

Port scan tool

1. It belongs to monitoring software
   Port scanning The tool is a software that can monitor , It has an excellent monitoring function for computer port scanning , It can effectively help staff to monitor the network ports of some relatively developed lines , meanwhile , An application program can surpass all controllable related devices to the greatest extent , Some equipment can be monitored , In this way, it can detect whether the software has virus intrusion , It can realize real-time monitoring , Keep the network safe .
2. Easy to use
   The port scanning tool is characterized by a small tool , It also belongs to the green installation free version , In other words, it can be deleted anytime, anywhere , No need to uninstall , And the use of software is easy to understand , Just open the port and connect it to the computer port , And it can be directly used through the corresponding filling and scanning , Port scanning can also be used for IP Port scan , And it can be through various IP Address to do the corresponding check , After rechecking, you can also directly locate the port .

Scanning mode of port scanning tool

One 、TCP Scanning mode

Port scanning TCP Scanning method is one of the simpler methods , This scanning method can be carried out with the help of the native network function of the operating system , And there is no need for special permission to use this scanning method , But the disadvantage is that this scanning method cannot realize the bottom control , And the scanning behavior is very easy to be detected by network administrators , And the scanner's in port cleaning IP The address will also be recorded .

Two 、SYN Scanning mode

This port scanning method actually belongs to TCP A type of scanning , However, this port scanning mode does not rely on the network function of the system itself , Instead, it generates its own network functions to send IP Data packets , A complete... Is not established in the scan TCP Connect . although SYN The scan is very rough , But the advantage of this scanning method is that it has more privacy .

3、 ... and 、UDP Scanning mode

UDP Scanning method is also a kind of scanning method often used by many network administrators , This scanning method belongs to protocol free scanning , In the scanning process, there is no packet sending process of the previous two scanning methods . But this scanning method is often disturbed by the firewall , When the firewall blocks it, the port will be opened by default , Therefore, in general, this scanning method is mostly used for port scanning of specific applications .

Port scanning tool is mainly used for

One 、 Confirm the role of security policy

At present, many large server rooms need to establish a set of safe operation strategies for the system , Different security policies usually need to open different ports to the outside , Port scanning can help network administrators to verify the reliability of the security policies used , And can pass the port test , To ensure that the security of the port is sufficient to resist external attacks .

Two 、 Confirm the role of system services

The server wants to communicate with other devices on the Internet , It usually needs the support of a large number of basic services , And the ports opened by different system services are completely different . In general, many network administrators , To confirm that the system service has been started correctly , Will be checked through port scanning , Not only can all open ports be found through port scanning , It can also solve many unknown hidden dangers .

3、 ... and 、 Improve the role of network security

There are many criminals hidden in the dark on the Internet , The way these outlaws invade the system , Mainly through port scanning of the system to be invaded , Find the port that can be used to enter the system for destruction . Therefore, at present, many network administrators will also conduct self-examination through port scanning in advance , This self-examination can better improve the security of the server in the network .

OpUtils - Advanced port scanning tools

OpUtils Advanced port scanning tools , Find the status of ports in the network by trying to connect to any open ports . This enables the administrator to check whether the network configuration is set according to the security policy of the enterprise , And remedy the violation of security policy . Our advanced port scanning tools include the following functions ：

• Real time switching port mapping
• A comprehensive summary of network ports
• Reminders and email notifications
• Port scanner widget
• Enable or disable interfaces in management
• Port scan scheduling
• Role Based Access Management