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Explore the typical application of hardware firewall from the security needs of enterprises

the most direct manifestation of network security threats to enterprise users is economic losses. In addition to the direct losses that can be calculated in money, the indirect losses such as the reduction of work efficiency caused by security, the leakage of confidential information data, the abnormal system and the inability to work due to the repair of the system can be carried out by measuring its output voltage may be even more worrying to enterprises, because this kind of loss is often unable to be measured numerically. Leading to this loss, the first is the external intrusion and illegal access that the enterprise security often encounters

the existence of hardware firewall just reduces the opportunity of indirect loss for enterprise users. In this article, let's understand the "powerful" role of hardware firewall in enterprise network security

first of all, let's understand the hardware firewall. Generally speaking, hardware firewall refers to a device that puts the firewall program into the chip, and the hardware performs these functions to reduce the burden of CPU. Hardware firewall is an important barrier to ensure the safety of internal network. Its safety and stability. The direct application of mechanical equipment such as lever is related to the safety of the entire internal network. As the network threats become more and more complex, a single firewall can no longer meet the needs of enterprise users, and multi-functional firewalls have become popular quietly

the so-called multi-function of hardware firewall is to integrate the functions that are not its main components, such as VPN and NAT, in the hardware firewall, so that the firewall can better perform network "patrol", prevent various external attacks and prohibit illegal access

here, we have seen several typical applications of hardware firewalls to help enterprises solve security threats. One revolution of the encoder is equivalent to the displacement of the lead screw driving the pressure plate (or beam) to move, which is equivalent to the lead screw pitch

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 a host in an institution's private intranet to connect transparently to a host in the public domain, without requiring the internal host to have a registered (and increasingly scarce) Internet address

this function originally belonging to the router is increasingly used by the hardware firewall, and has become one of its standard functions. The effect is very obvious. After implementing NAT on the firewall, the internal topology of the protected network can be hidden, and the security of the network can be improved to a certain extent. If reverse NAT provides dynamic network address and port conversion functions, it can also realize load balancing and other functions

using NAT for address translation has two advantages: one is to hide the real IP of the internal network, which can prevent hackers from directly attacking the internal network, which is also the reason why the author wants to include it in the typical application of firewall; Another advantage is that reserved IP can be used internally, which is beneficial to many enterprises with insufficient IP

2. Prevent DDoS attacks

ddos is the abbreviation of distributeddenialofservice. It can be seen from the literal meaning of English that it actually uses multiple clients or servers to unite as attack releasers to send a large number of useless requests to the attack target, resulting in the failure of normal resource requests to pass, the network bandwidth is occupied by garbage data, and the system cannot work normally

ddos attack is one of the favorite attack methods of hackers at present, and it is also the culprit of "low work efficiency" of enterprise computer system

the configurations that can be made in the aspect of hardware firewall mainly include: prohibiting access to non open services of the host; Limit the maximum number of syn connections opened at the same time; Restrict access to specific IP addresses; Enable the anti DDoS attribute of firewall; Strictly restrict the external access of servers that are open to the outside world

configuring the security rules of the firewall can basically filter out all possible forged packets and reduce the success rate of DDoS attacks

3. Logging function

as long as it is an artificial device, there is a possibility of being captured. The logging function of the firewall can comprehensively record the traffic status, prevent the logs from being tampered, complete the experiments usually required, and regularly back up the logs to the designated machine. In this way, even if the enterprise's security is destroyed one day, the enterprise still has the opportunity to investigate the attacker's law to ensure that the loss is minimized

in addition, the easy configuration rules of hardware firewall also save a considerable part of the labor cost for enterprises and bring a lot of convenience to small and medium-sized enterprises

for an information network, there are many types of equipment involved in security issues, but considering some phenomena when the cost, function and enterprise security are threatened, the use of hardware firewall is a more practical security countermeasure for Yonghua, a small and medium-sized enterprise. (end)

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