Nowadays, connectivity is a must in our daily lives. Either for work or school or just for fun, being connected to an internet network is the norm. Emailing your boss or client, needs internet, research for schoolwork, checking your social media. And today, in a time of virtual meetings and classes and WFH setups, we need to be connected.
But while the internet is generally seen as a good thing during this time, bad things are unavoidable. Cyber attacks and computer viruses have surfaced that can wipe your device and all the crucial data in it clean or, worse, be stolen by malicious people for their use.
That’s why a security system is imperative when traversing through public and untrusted networks like the internet. What we need is a network firewall.
What is a Network Firewall?
We all know what a firewall is. It’s a barrier that protects your network or device from outside threats by preventing unauthorized access. And a firewall can be different types based on structure or method of protection.
A network firewall security is a type of firewall that can control what can access your organization’s network and thereby protects your network. It filters incoming traffic and blocks unsafe ones before it even gets inside your network to cause damage. It protects by separating your network from outside networks as well as controlling the communication between these networks.
Network firewalls are typically used by organizations that have a network of multiple devices, servers, and users. So, if a company wants to restrict certain websites, IP addresses, or services like instant messenger, it can do so with a network firewall. It also safeguards sensitive data, such as employee information or customer databases. With a firewall, these data cannot be accessed by intruders.
How Can a Network Firewall Stop Attacks?
So now that we know the importance of a network firewall, we also have to know the how of it, specifically, how a network firewall can stop attacks.
A network firewall security controls the flow of incoming and outgoing traffic and data between your network and the outside network, for example, the internet. Sometimes, these data, also known as packets, can contain malicious codes that could damage your system, wipe your internal data, or even steal them from your network. Hackers can send these harmful codes that have malware, spam, or virus to an unprotected network.
A network firewall has a specific set of policies and rules, and it applies these rules to the network traffic coming and going in between the servers. If the traffic is legitimate and matches the criteria set by the firewall policy, then it goes through with no problem. However, when a packet doesn’t meet the criteria, the firewall deems it unsafe and rejects or blocks it from getting through. It could be that it contains harmful content that could damage the internal network. By doing this, your network remains safe from any kind of threat. It works for internal connections as well, not just with internet-facing network ones.
Types of Network Firewall
A network firewall also has different types, each with its functionalities and varying levels of security that could be ideal for your organization. The different types of it include:
- Packet filters – these are the traditional firewall systems that merely scan packet information such as IP addresses of source and destination, protocols, and ports. These determine whether these packets are allowed to go through. Because of how basic it is, a packet filtering firewall has a low level of security and can be easily bypassed.
- Stateful inspection firewalls – this type of firewall can achieve two things: classify traffic flow based on the destination port and track packets in every connection. Once a session is established, the stateful firewall allows communication.
- Application layer firewalls – these firewalls examine application-layer information such as HTTP, FTP, etc. They can also block non-legitimate applications immediately.
- Next-generation firewalls – these are considered the most advanced among the firewalls. They have deep packet inspection capabilities that can scan the entire content of the packet, not just the header. It also has intrusion prevention systems, web application firewalls, and more.
Invest in Network Firewall Hardware with 99% Malware Removal
Being connected should not mean that you have to compromise your safety and security. That’s why investing in a firewall should be a priority when dealing with your sensitive data. And for maximum security, trust only in smart tech that assures a 99% guaranteed malware protection with Sangfor and their state-of-the-art hardware firewall Next generation application firewall. It’s the world’s first AI-enabled NGFW with integrated web application firewall and endpoint security and malware detection software for complete protection. This easy-to-use, all-in-one security solution is designed to protect organizations from internal, external, existing, and future threats. So, invest in the future now with Sangfor.