What's the difference between a firewall and a security gateway? What are their uses?

Firewall technology is a technology that organically combines all kinds of software and hardware devices used for security management and screening to help computer networks build a relatively isolated protection barrier between their internal and external networks, so as to protect user data and information security.

Security gateway is a multi-functional device, and it also has the function of network firewall. Network intrusion detection function and anti-virus function, etc. Security gateway includes two modes, namely bridge mode and gateway mode.

Second, the difference between security gateway and traditional firewall:

Difference 1:

The function module of the traditional firewall is located in the third layer of the seven-layer network protocol, and the IP packet of the traditional firewall is carried out by a common state detection technology. In the working process, the security gateway can not only realize the common state detection technology, but also realize various filtering functions. In addition, the security gateway can also be set with anti-virus, intrusion detection, VPN and other functions, and can be turned on and off at will. In addition, it can be combined with the firewall strategy to make the effect of the function more obvious.

Difference 2:

From the system point of view, the security gateway can not only set the network access authority, but also identify and forward the data packets in the system compared with the common firewall, and can handle some modules with heavy workload, thus reducing the workload required by the modules in the data processing process and improving the system performance and efficiency to a certain extent.

Third:

The function of security gateway is very powerful, and some new functions can be implanted. It is compatible with all kinds of new technologies. Security gateway has a high application prospect, and its application scope is wider than that of traditional firewall.

Fourth:

The operation page of the security gateway is also different from the traditional firewall. Its operation page can clearly see the various strategies of the firewall, with clear hierarchy, simple operation and flexible application. It is a very practical firewall.