The application of hardware firewall in enterprise safety excavation

The most direct performance of network security threat to enterprise users is economic loss. Remove the direct loss of available money to calculate, due to security resulting in reduced efficiency, confidential information data leakage, system is not normal, repair systems and other indirect losses caused by the work can not be more worried, because this loss is often unable to use digital measurement. The result of this loss is that the network's enterprise security often encounters external intrusion and illegal access.

and the existence of hardware firewall just reduces the opportunity of indirect loss for enterprise users. In this article we let us understand the hardware firewall in the Enterprise network security "strong" role.

Let's first get to know the hardware firewall. In layman's terms, a hardware firewall is a device that puts a firewall program into a chip that performs these functions by hardware to reduce the burden on the CPU. Hardware firewall is an important barrier to protect the internal network security, its security and stability, directly related to the security of the entire internal network. Because of the increasingly complex network threat, a single firewall can not meet the needs of enterprise users, multi-function firewall began quietly popular.

The so-called hardware firewall to achieve multi-function, is in the hardware firewall set cost is not its main components such as VPN, Nat and so on, so that the firewall to better perform the network "Patrol", to prevent a variety of external attacks and prohibit illegal access.

Here, we have seen several typical applications of hardware firewalls to help businesses address security threats.

1, NAT (network address translation) application

Network address Translation (NAT) is a standard method for mapping an address domain, such as a private intranet, to another address domain, such as the Internet. NAT allows hosts in an organization-specific intranet to be transparently connected to hosts in the public domain without the need for internal hosts to have registered (and increasingly scarce) Internet addresses.

This originally belongs to the function of the router is more and more be used by the hardware firewall, and become one of its standard function, the effect is very obvious. After NAT is implemented on the firewall, the internal topological structure of the protected network can be hidden and the security of the network is improved to some extent. If the reverse NAT provides dynamic network address and port conversion function, it can also achieve load balancing functions.

There are two benefits to applying NAT for address translation: One is to hide the real IP of the internal network, which makes it impossible for hackers to attack the internal network directly, which is why I want to include it in the typical application of firewall. Another benefit is that you can use reserved IP internally, which is good for many IP-deficient businesses.

2. Prevent DDoS attack

DDoS is the abbreviation of distributed denial of service, which can be seen from the literal meaning of English, it is to use multiple customers or server-side together as the attack release, send a large number of useless requests to the attack target, resulting in the normal resource request cannot be passed, The network bandwidth is full of garbage data and the system does not work properly.

DDoS attack is one of the most popular attacking methods for hackers, and it is also the culprit of "inefficient work" of enterprise computer system.

The configurations that can be made in hardware firewalls include the prohibition of access to non-open services to the host, limiting the maximum number of SYN connections that are open at the same time, restricting access to specific IP addresses, enabling the anti-DDoS properties of firewalls, and strictly restricting external access to the server.

The security rules for configuring firewalls can basically filter out all possible spoofed packets and reduce the success rate of DDoS attacks.

3, the logging function

As long as it is man-made equipment there is the possibility of being breached. The log logging function of the firewall can record the traffic state more comprehensively and prevent the log from being tampered with, and can also back up the log to the specified machine periodically. In this way, even if the security of a company is destroyed, the enterprise also has the opportunity to hold the attackers legal responsibility, to ensure that the loss to a minimum.

In addition, the hardware firewall easier configuration rules for enterprises to save a considerable part of the human cost, for small and medium-sized enterprises to bring a lot of convenience.

For an information network, the security problem involves a lot of types of equipment, but considering the cost, function, enterprise security is threatened by some phenomena, the use of hardware firewall at present for small and medium-sized users is a more real security countermeasures.