Blog Article

How to Define Network Firewall Types

A firewall is a type of network security system. It controls and monitors outgoing and incoming network traffic. Firewalls are generally set up between two networks: one that is trusted and the other that is not. The purpose of a firewall is to prevent hackers from exploiting your system to gain access to sensitive information. In addition to controlling outgoing network traffic, it helps protect your system from malware and other threats. The types of firewalls include Proxy service firewalls, Stateful inspection firewalls, and Unified threat management (UTM).

Proxy Service Firewall

A proxy service firewall is a network firewall that prevents the direct connection between users and external sites. The benefits of proxy firewalls are substantial and provide a secure foundation for network security. Proxy firewalls offer deep packet inspection, making them highly effective in preventing sophisticated malware attacks. The network firewall function is one of the most important aspects of a proxy service. 

A proxy firewall is a network firewall used as a gateway between a secure internal network and the public Internet. To use a proxy firewall, all devices within the network must interact with a proxy gateway. This proxy then transfers data from the internal network to the Internet, receives information from the database, and delivers it back to the local network. Proxy firewalls use packet-filtering proxy servers to simulate the operation of end devices and prevent unauthorized access.

A proxy service firewall also improves the performance of websites. Many proxies provide cache facilities, storing data within the network for fast delivery when a user makes a request. Depending on the type of proxy used, these caches can be helpful, saving important webpage information for speedier loading. However, it is essential to remember that this feature only works when the proxy contains a webpage cache. There are many types of proxy services, and these firewalls must be chosen carefully.

Stateful Inspection Firewall

Stateful inspection is a type of firewall that inspects every packet. The device can also maintain the state table of an established network or TCP session. Although stateful inspection provides greater security, it can also strain the network’s performance. Another type of firewall is a multilayer inspection firewall, which looks at the flow of transactions across multiple OSI layers and protocols. This type of firewall is beneficial for large networks where many different users share the same network.

This kind of network firewall identifies and filters incoming and outgoing communications packets by checking the context of the data in the packet’s header. It then authorizes or rejects incoming or outgoing packets and monitors all sessions and packets. Of course, the process depends on the type of firewall and the protocol used. However, stateful inspection firewalls can be highly efficient at preventing malicious traffic and ensuring the security of networks.

In addition to inspecting incoming packets, stateful inspection firewalls are also helpful in identifying network threats. These types of firewalls can be used to block application layer attacks and block advanced malware. They are often called next-generation firewalls, and most companies currently use them. However, they can cause significant network traffic slowdowns and are vulnerable to distributed denial-of-service attacks. In addition, they can cause many problems and are not recommended for small networks.

Unified Threat Management (UTM) Firewall

Unified threat management (UTM) firewall is one of your network’s most effective security tools. UTM is a new approach to information security that utilizes one hardware and software installation to perform multiple security functions. This approach is beyond the traditional method of using point solutions for each security function. As a result, it is the ideal solution for your organization’s network security needs. Its many benefits include a more flexible configuration and easier management.

Next-generation firewall vendors are focusing on mission-critical and high-priority use cases. Their firewalls deliver the tools necessary to investigate and protect your organization against diverse threats. These products also integrate with third-party security apps. However, the complexity of these systems can reduce agility and impede security operations. Using a single-point firewall and UTM, your network will be protected in any threat scenario, including a blended attack.

A UTM firewall is an effective tool for protecting your network against malware. It detects and responds to threats based on their behavior and characteristics. It can be configured to detect known malware as well as novel threats. UTM firewalls can also see and prevent devices inside your network from spreading malware. And while you may feel comfortable using a UTM firewall, be aware that integrating it into your network is a complex process.