The difference between NAT and DMZ in industrial wireless routers

The difference between NAT and DMZ in industrial wireless routers

The industrial-grade wireless router adopts a high-performance 32-bit industrial-grade ARM9 communication processor, and uses the embedded real-time operating system as the software support platform. The system integrates a full range of communication protocols from the logical link layer to the application layer, and supports static and dynamic routing. PPP server and PPP client, VPN (including PPTP and IPSEC), DHCP server and DHCP client, DDNS, firewall, NAT, DMZ host and other functions. So what is the difference between DMA and NAT for wireless industrial routers?

Industrial Wireless Router

Industrial Grade Wireless Router

NAT introduction:

NAT - Network Address Translation, which hides the IP address of internal management by converting private network addresses (such as intranets) into public addresses (such as the Internet). In this way, by using non-registered IP addresses internally and converting them to a small subset of externally registered IP addresses, the cost of IP address registration is reduced and the address space (ie, IPV4) that is currently lacking is saved. At the same time, this also hides the internal network structure, thereby reducing the risk of attack on the internal network.

NAT functions are usually integrated into routers, firewalls, and separate NAT devices. Of course, most popular operating systems or other software (mainly proxy software, such as WINROUTE) also have NAT functions. A NAT device (or software) maintains a state table that maps private IP addresses on the internal network to legal IP addresses on the external network. Each packet is translated into the correct IP address in the NAT device (or software) and sent to the next level. Unlike ordinary routers, the NAT device actually modifies the packet header, changing the source address of the internal network to the NAT device's own external network address, while ordinary routers only read the source address and the packet before forwarding the packet to the destination. Destination address. NAT is divided into three types: static NAT (staticNAT), NAT pool (pooledNAT) and port NAT.

Industrial 4G Router

DMZ introduction:

DMZ is the abbreviation of "demilitarized zone" in English, and the Chinese name is "isolated zone". It is to solve the problem that the external network cannot access the internal network server after installing the firewall, and a buffer zone between the non-secure system and the security system is established. This buffer zone is located in the small network area between the internal network of the enterprise and the external network. , In this small network area, you can place some server facilities that must be public, such as enterprise Web server, FTP server and forum. On the other hand, through such a DMZ area, the internal network is more effectively protected, because this network deployment has one more barrier for attackers than the general firewall solution.

Network equipment developers, using this technology, have developed corresponding firewall solutions. It is called the "demilitarized zone structural model". The DMZ is usually a filtered subnet that creates a safe zone between the internal network and the external network. A DMZ firewall solution adds a line of security to the internal network to be protected and is generally considered very secure. At the same time, it provides an area to place public servers, which can effectively avoid the situation that some interconnected applications need to be disclosed and contradict internal security policies. The DMZ area usually includes the bastion host, Modem pool, and all public servers, but it should be noted that the e-commerce server can only be used for user connections, and the real e-commerce background data needs to be placed in the internal network.

Changsha Zhongke Zhilian Technology Co., Ltd. is mainly engaged in the research and development, production and sales of 4G industrial routers, 5G industrial routers, industrial switches, DTU, RTU, LoRa gateways and smart device products. With the corporate positioning of "humanization, specialization, and technology", we constantly attract professionals with high quality and high education to join us; with the rapid development of the market economy, our company's products are also sold in foreign markets, including the United States, Germany, Russia, Egypt, India, Thailand, Singapore, Vietnam, India, Australia and many other countries. And we will always maintain our development momentum, continue to expand domestic and foreign markets, and become bigger and stronger. All colleagues of Changsha Zhongke Zhilian Technology Co., Ltd. have always adhered to the premise of technological development and innovation, and customer service as the basis, and constantly improved the construction of the company's soft and hard facilities.