What is the use of port forwarding? Introduction to typical application scenarios of port forwarding

in the complex network environment, the demand for connectivity between different devices and different networks is increasing day by day. Port forwarding, as a basic network technology, is quietly solving many problems of cross-network access and service sharing. Many people's cognition of port forwarding only stays at the technical noun level, but they do not understand the convenience it can bring to daily office, development, and home network management. This article will deeply disassemble the practical value of port forwarding, and combine specific application scenarios to let everyone clearly grasp the core role and usage logic of this technology.

How to achieve teleworking access by port forwarding?

teleworking has become the norm in the workplace, but intranet office systems and file servers usually only allow access within the local area network, and port forwarding is the key technology to break this restriction.

1, extranet access

enterprise's OA system and financial system are generally deployed on the intranet server, and only LAN devices can directly access it. Through port forwarding technology, the designated port of extranet IP can be mapped to the corresponding server level port of the intranet server. In the external network environment, remote employees can securely access the intranet office system by simply adding the forwarding port through extranet IP.

2. Cross-network sharing of intranet file servers

important files of some enterprises are stored in the intranet file server, and employees cannot directly retrieve them during teleworking. With the help of port forwarding, the extranet port is bound to the file sharing port of the intranet file server, and employees can access the file server through the specified address on the external network to realize file reading and uploading, and ensure the efficiency of teleworking. At the same time, through the permission configuration of port forwarding, access to IP can be restricted and file security can be improved.

2. Port forwarding helps local development environment debugging?

software development process, locally developed services are usually only accessible within the local machine or local area network, and port forwarding provides a convenient way for cross-network debugging and customer preview.

1, cross-network preview of locally developed Web services

developers in the local computer to build a Web project, if you need to preview the effect of remote customers or colleagues, without deploying the code to the extranet server, through the port forwarding tool, the port of the local Web service can be mapped to the public network address, remote personnel only need to access the public network address, you can directly view the local development of Web pages, real-time feedback modification, greatly improve the efficiency of development iteration.

2, local debugging and docking of IoT devices

develop IoT applications, devices usually need to interact with the local debugging server for data, but some IoT devices can only connect to the public network. At this time, port forwarding can map the ports of the local debugging server to the public network, allowing IoT devices in the public network environment to communicate directly with the local debugging server. Developers can complete functional testing and debugging of devices without deploying debugging services to extranet, simplifying the development process.

port forwarding to achieve extranet access for home devices?

cameras, NAS storage and other devices in the home network, only support LAN access by default, and port forwarding allows users to remotely control these devices in the external network environment.

1, home surveillance camera remote viewing

home installed network surveillance camera, usually can only view the screen in the same WiFi environment. By configuring port forwarding in the router and mapping the extranet port to the monitoring server level port of the camera, users can access the extranet IP plus forwarding port through their mobile phones or computers in the external network environment. They can view the home monitoring screen in real time and keep abreast of the home security situation at any time. There is no need to rely on the Cloud as a Service of the device manufacturer to avoid the privacy risks and expenses caused by cloud storage.

2, cross-network access to home NAS storage

home NAS stores a lot of photos, videos, documents and other data, which cannot be directly retrieved when going out. Using port forwarding technology, the extranet port is bound to the access port of the NAS, and users can access the NAS through the specified address in the external network, read or upload data, which is equivalent to carrying a large-capacity mobile storage device with them, which meets the needs of cross-network data access.

4. How to optimize cyber security protection for port forwarding?

port forwarding is not only used to connect to the network, but also to improve the security of network services to a certain extent, reducing the risk of direct exposure.

1, hide the real port of the intranet server

if the server level port of the intranet server is directly exposed to the extranet, it is easy to become the target of hacker scanning attacks. Through port forwarding, the non-standard port of the extranet can be mapped to the standard server level port of the intranet server. For example, the 10086 port of the extranet can be mapped to the 22 SSH port of the intranet server. It is difficult for hackers to directly locate the real server level port when scanning, which greatly reduces the probability of the server being attacked and improves the security of the intranet service.

2, to achieve a single public IP multi-service forwarding

some enterprises or individuals only have one public IP, but need to provide multiple network services externally. Port forwarding can map different extranet ports to the corresponding server level ports of different servers in the intranet, so that a public IP can provide Web, FTP, mail and other services at the same time. There is no need to apply for multiple public IP. At the same time, through the rule configuration of port forwarding, the access IP of different services can be restricted to further strengthen cyber security protection.

sum up, port forwarding is a highly practical network technology that plays a key role in teleworking, development and debugging, home network management, cyber security protection and other scenarios. It can not only break the access barriers between different networks, realize cross-network service sharing and equipment control, but also optimize cyber security configuration and reduce the risk of service exposure. Through the rational use of port forwarding, both enterprises and individuals can improve the flexibility and security of network use and meet the diverse network connectivity needs.