How Do Firewalls Protect Your Network From Intrusion Detection?

protect your network

A firewall is an internet security method. It analyzes and scans all data traffic flowing to and from your network as per a predefined set of regulations. Firewalls block uncertified data traffic and allow only the data that is supposed to be secure. The process involves a set of security restrictions that you or your network manager specify.

Firewalls analyze the meta content of data packets and decide whether to allow or block traffic depending on established rules. It builds a block of perimeters through which some specific kinds of data cannot pass. A firewall can analyze threats and prevent unlawful data from entering your network. So, a firewall can be better interpreted as an Intrusion Prevention System (IPS) rather than an Intrusion Detection System (IDS).

Firewalls are hardware or software devices for preventing unauthorized access to your network. This network security system scans the incoming and outgoing data in a network. The process runs under a set of predefined rules to identify and prevent cyber threats.

Cybercrime is affecting all kinds and sizes of businesses in terms of fame and money. This is why network security has become a crucial part of IT services. Organizations tend to outsource IT help desks to avail support on network issues. Moreover, ensuring security is now the prime responsibility of a service desk company.

A network firewall is a shield that safeguards your network by deterring unauthorized access to your network. However, there are many types of firewall systems, and you need to know which one is appropriate for your IT setup. So, let’s learn about different types of network firewalls and how they can protect your network from intrusions.

What are Different Types of Network Firewalls?

A network firewall is a security method that can regulate the passage of data to your private network to protect your system from cyber threats. It works like a scanner to restrain unauthorized traffic from entering your enterprise’s network, which can cause harm.

Firewalls aim to protect your private network from malicious data traffic. It intends to keep your personal network detached from external networks. It also manages the contacts between personal and external networks. Various kinds of network firewalls include:

  • Packet filters: These are definitive firewall techniques that depend on details of the data packet, such as source and destination IP address, rules, and ports linked with respective data. These particulars determine the legitimacy of the packet data, and the firewall allows or blocks the access of data traffic accordingly.
  • Stateful inspection firewalls: These firewalls come with an enhanced capacity for scanning data packets within a whole session. If the session is correctly set up between two endpoints, following the predefined protocols, the firewall allows further contact.
  • Application layer firewalls: These firewalls verify all the data attached in various layers of the application, such as FTP, HTTP requests, etc. If there is any illicit data or applications, the firewall will block them instantly.
  • Next-generation firewalls: These are cutting-edge firewall techniques with resounding assessment capacities, it works beyond matching protocol or port barring and scanning. It includes application-level inspection, intelligence, intrusion prevention, web application firewalls, etc.

How Does Firewall Protect Your Network from Intrusions?

Network firewalls restrain the data and traffic flowing to and from your network. These data are referred to as packets. The data packets may contain hostile codes that can harm your system.

During some special hours, the hackers may try to flood your network with spam, malware, virus, and other threatful content. In such situations, firewalls apply a set of predefined restrictions on the data traffic to and from your network.

If the data content matches the protocols, the firewall will allow the traffic into the network, and a mismatch of protocols will result in rejection. This procedure keeps your network completely secure from all kinds of internal or external threats.

Firewalls not only protect the external network but also save the internal network from cyber threats. Most of the time a cyber threat is initiated internally. So, you should implement firewall techniques in all facets of your IT setup. To learn more, please read What is a firewall? Firewalls explained and why you need one.

How to Grab the Highest Benefits from Your Firewall?

Numerous factors come in the way of executing a firewall in your network. If you outsource services from a third-party provider, make sure you get services according to outsourced IT help desk pricing.

Before you opt for a firewall to safeguard your network system, consider the below points.

  • Review the range of the firewall: It is crucial to check if your firewall protection is covering all your systems within the network. The urgency arises when you make changes in your network. Whenever you make any changes, make sure the systems are still within the firewall protection.
  • Always check the connected devices: If you or anyone from your team connects a personal device, such as a smartphone or tablet to the network, make sure to protect them. You can install an individual firewall to protect data in these devices.
  • Set apart your payment method: Protect your payment flow by removing any kind of loopholes from the system. To ensure this, establish your firewall system in a way that blocks all types of unauthorized data transmission to/from your payment circles.
  • Allow the things which have a vital part in the processing of cards to allow uninterrupted sales. However, you should restrict direct contact between these payment systems and the Internet.


To sum up, firewalls restrict the passage of network traffic to safeguard your devices. It blocks or allows the entrance of data packets depending on protocols established by the firewall administrator.

Each rule under the protocol specifies a distinct traffic design that the firewall identifies. The firewall then takes action to allow or block the traffic based on the protocol-matching results.

With the increase in cybercrime every passing day, network firewalls have become crucial for all businesses. So those who receive services from an IT service desk company must ensure that the service provider implements firewalls in all connected devices.

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