Firewall And Antivirus Software

The best way to protect yourself from viruses and malware is by having both a firewall and an antivirus software program installed on all of your devices. It’s important to remember that firewalls aren’t foolproof, but they can definitely help keep unwanted intruders off your computer or laptop. The same goes for antivirus programs as well—they can detect malicious files before they damage anything important!

In this guide, we review the aspects of Firewall And Antivirus Software, importance of antivirus and firewall, example of firewall, and difference between firewall and proxy server.

Firewall And Antivirus Software

You may be wondering about the difference between firewall software and antivirus software. Firewall software is a barrier that protects your computer or other device from hackers, viruses, intruders and other dangers online. Antivirus software is a program that detects and removes malicious code from your PC or smartphone. They both do different things but can be used together to create an effective security strategy for your digital devices.

The Difference between Firewall Software and Antivirus Software

Firewalls are one of the most important security tools in your arsenal. They’re a barrier between you and the internet, and they control what can enter or leave your network. A firewall is like a border guard at an airport: it checks passports, visas, and other forms of identification before allowing a person or item into a country.

Antivirus software is also a type of security tool that protects digital devices from viruses and malware (malicious software).

A firewall is a barrier between you and the internet.

A firewall is a software program that protects your computer from outside attacks. A firewall can protect your computer from viruses and other malware, prevent outsiders from accessing your computer or network, and prevent you from accessing certain websites. There are two types of firewalls: personal firewalls and stateful packet inspection (SPI) devices.

An antivirus software is a program that protects your digital devices.

Antivirus software is a program that protects your digital devices from malware, viruses, spyware and Trojans. As the name suggests, antivirus software can also protect you against adware.

Antivirus software works by scanning incoming files in order to detect if they are malicious or not. If the scan detects any suspicious code it will then isolate it for further examination by its own internal engine. This way there is no need for human intervention every time something suspicious is detected as the quarantine process begins automatically as soon as an infected file enters your device’s system without having been checked manually first.

The Best Firewall Programs to Use

Firewall programs are used to protect your computer from hackers and malware. They work by blocking unauthorized access to your computer through the Internet, so if you’re using a firewall program, it’s unlikely that a hacker can break into your computer from outside the network.

There are two kinds of firewall programs: paid and free. Paid firewalls tend to be more secure than their free counterparts (since they’re not just as easy for hackers to crack), but both types will do a good job of keeping hackers at bay if they’re well-configured and maintained regularly.

The best way to use a firewall is on all devices that connect directly (or indirectly) with the internet—this includes laptops, desktops, phones and tablets—and even gaming consoles!

Paid firewall programs

Paid firewall programs are more reliable, have better features, are more user-friendly and provide more protection than free firewall programs. They also offer a higher level of security and stability.

Antivirus software is another type of program that can help protect your computer from viruses. Antivirus software is software that searches for malicious files in your computer and deletes them.

Free firewall programs

  • Kaspersky Free Antivirus: This is a full-featured antivirus program that offers real-time protection, automatic updates and a user-friendly interface.
  • Avira Free Antivirus: This is another well-known free firewall program that also includes an easy to use interface and malware detection. It’s also available for both Windows and Mac computers.
  • Avast Free Antivirus: This antivirus software has been around for quite some time now and has built up a solid reputation among users due to its ease of use and powerful features like anti-ransomware, anti-phishing and memory scanner support.
  • AVG AntiVirus FREE : This free antivirus program was designed specifically for home users who want basic virus protection while surfing the internet or checking emails on their laptop or desktop computer(s). It’s easy to install & very lightweight (less than 2MB) so it won’t slow down your computer either! The only drawback is that it only protects 5 devices per license (so if you have more than 5 devices then you might need something else).

How to Pick an Antivirus Software Program for Your Devices

Before you can begin using antivirus software, you have to find one that’s right for you. To do that, we recommend starting with these tips:

  • Check compatibility. If your device runs on Windows, macOS, or Linux and is not a mobile phone or tablet, then it should be compatible with most antivirus programs. However, if the program isn’t optimized for your device’s operating system (OS), it may not work properly—or at all! We’ve found that the best way to avoid this issue is to look for security software companies such as Norton AntiVirus or McAfee AntiVirus who specialize in providing protection for multiple OSs as well as laptops and desktops.
  • Make sure it’s up-to-date. You should also make sure that any antivirus software installed on your devices has been updated recently—this ensures that new malware threats will be detected before they can cause damage to your data files or network connection speed. Most programs automatically update themselves when updates are available; however some do require manual updating by users every few months (depending on what kind of protection plan they purchased).
  • Get real-time protection from viruses and other threats through automatic scanning features built into most modern anti-virus software products such as AVG Antivirus Pro 2019 – 1 Year Subscription License Key Code Disc With Full Lifetime Updates & Support via Email Delivery so that even if something slips past one set of filters there will be another layer waiting around the corner ready to catch anything else trying its luck against an unprotected computer system like yours!

Paid antivirus software programs

Paid antivirus software programs are better than free ones. They’re more reliable, they have more features and they’re easier to use. Paid antivirus software programs also do a better job of protecting your computer from malware than free ones.

If you want to buy an antivirus program, make sure that it’s from a reputable company so that you know it will work well for your needs and provide you with excellent customer service if anything goes wrong with the product or subscription service (such as renewal).

Free antivirus software programs

Free antivirus software programs are the most popular option. However, they’re not necessarily better than paid antivirus programs. The main reason for this is that free antivirus software tends to be slower and more bloated with ads than its paid counterpart.

On top of that, free antivirus software often has fewer features than its paid counterpart—and may even lack certain key components like a firewall or browser protection, as well as a real-time scanner (which is used to detect malware on your computer).

When choosing an anti-virus software program you should also consider getting a firewall.

Firewall software protects your computer or network from outside attacks. A firewall can be used to keep malware from getting onto your device, from spreading to other devices on the same network, and from communicating with the outside world.

importance of antivirus and firewall

Antivirus software is software that is installed on a computer system to protect it from viruses, spyware, malware, Trojans, phishing attacks, rootkits and spam attacks, as well as any other cyber threats.

Businesses likely use computers on a daily basis, which is why it’s paramount that they have sufficient virus protection. Computer viruses are more sophisticated and harmful than ever; a virus could damage a computer to the point where it can no longer be used. In order to protect your business and its computer systems, you need antivirus software.

Here’s a look at viruses and antivirus protection in more details:

What is a Virus?

A computer virus follows a similar process to that of the flu virus, in that it is designed to spread from host to host and can replicate itself. But from a more technical standpoint, computer viruses are a type of malicious code or programme that alter the way a computer operates and is designed to spread between computers by inserting its own code into computer programmes.

A virus has different kinds of functions, from making a computer run slowly to damaging parts of the system, stealing personal details or sending out unauthorised messages. Computer viruses are said to cause billions worth of economic damage each year due to causing system failures, corrupting data, stealing data and increasing maintenance costs.

Where Do Viruses Come From?

Viruses are written by highly skilled programmers to damage people’s computers, steal information or even cash. They work to exploit security vulnerabilities to infect computer systems and spread their virus.

The reason for the viruses can vary. For some, it may not be for malicious purposes and they simply want the “bragging rights” that come with creating and spreading a virus, and it may do no more damage than creating annoying pop-ups. However, some do it to gain access to data, such as credit card information, passwords or personal identity information. Viruses can even be used to gain remote control of a computer, or even damage computer systems, which may be utilised by competing business entities to destroy the competition.

What are the Different Kinds of Viruses?

Like viruses in the human body, computer viruses come in many different types. Types of viruses include:

How Does Antivirus Work?

Antivirus software is designed to detect, prevent and take action against malicious software in your computer, including viruses. Even if you’re smart with how you use your computer to avoid coming into contact with a virus, antivirus software is an essential part of a good security strategy.

Antivirus software runs in the background and checks every file you open and compares it to known viruses and other types of malware; this is to help you prevent your machine from becoming infected. The software also runs system scans to ensure that no viruses are lying dormant on your computer. If your antivirus software comes across a signature for a virus or other malware, it will stop that file from running and put it into quarantine, where it will either delete it automatically or you can choose to run it if you’re confident it is a false detection.

Why is Antivirus Important?

Antivirus protection is essential for any business wanting to protect their data and computer systems from becoming corrupted. Antivirus software is the security person at the gate preventing unwanted persons from entering. Prevention is much more effective than cure, so it’s better to have a system in place designed to detect and prevent virus attacks than having to spend time and money repairing infected machines.

Additionally, from a business perspective, your reputation could be on the line if a virus exposes personal client data or sends unsolicited emails to your contacts in an attempt to spread the virus further.

example of firewall

More than 30 years after the concept of the network firewall entered the security conversation, the technology remains an essential tool in the enterprise network security arsenal. A mechanism to filter out malicious traffic before it crosses the network perimeter, the firewall has proven its worth over the decades. But, as with any essential technology used for a lengthy period of time, developments have helped advance both the firewall’s capabilities and its deployment options.

The firewall traces back to an early period in the modern internet era when systems administrators discovered their network perimeters were being breached by external attackers. There was destined to be some sort of process that looked at network traffic for clear signs of incidents.

Steven Bellovin, then a fellow at AT&T Labs Research and currently a professor in the computer science department at Columbia University, is generally credited — although not by himself — with first using the term firewall to describe the process of filtering out unwanted network traffic. The name was a metaphor, likening the device to partitions that keep a fire from migrating from one part of a physical structure to another. In the networking case, the idea was to insert a filter of sorts between the ostensibly safe internal network and any traffic entering or leaving from that network’s connection to the broader internet.

The term has grown gradually in familiar usage to the point that no casual conversation about network security can take place without at least mentioning it. Along the way, the firewall has evolved into different types of firewalls.

This article somewhat arbitrarily argues that there are five key types of firewalls that use different mechanisms to identify and filter out malicious traffic, but the exact number of options is not nearly as important as the idea that different kinds of firewall products do rather different things. In addition, enterprises may need more than one of the five firewalls to better secure their systems. Or one single firewall may provide more than one of these firewall types. There are also three different firewall deployment options to consider, which we will explore in further detail.

Five types of firewall include the following:

Firewall devices and services can offer protection beyond standard firewall function — for example, by providing an intrusion detection or prevention system (IDS/IPS), denial-of-service (DoS) attack protection, session monitoring, and other security services to protect servers and other devices within the private network. While some types of firewalls can work as multifunctional security devices, they need to be part of a multilayered architecture that executes effective enterprise security policies.

Here you’ll find an introduction to firewall as a service (FWaaS). Explore4 features and benefits to help you determine if FWaaS should be on your list of possibilities.

How do the different types of firewalls work?

Firewalls are traditionally inserted inline across a network connection and look at all the traffic passing through that point. As they do so, they are tasked with telling which network protocol traffic is benign and which packets are part of an attack.

Firewalls monitor traffic against a set of predetermined rules that are designed to sift out harmful content. While no security product can perfectly predict the intent of all content, advances in security technology make it possible to apply known patterns in network data that have signaled previous attacks on other enterprises.

All firewalls apply rules that define the criteria under which a given packet — or set of packets in a transaction — can safely be routed forward to the intended recipient.

Here are the five types of firewalls that continue to play significant roles in enterprise environments today.

1. Packet filtering firewall

Packet filtering firewalls operate inline at junction points where devices such as routers and switches do their work. However, these firewalls don’t route packets; rather they compare each packet received to a set of established criteria, such as the allowed IP addresses, packet type, port number and other aspects of the packet protocol headers. Packets that are flagged as troublesome are, generally speaking, unceremoniously dropped — that is, they are not forwarded and, thus, cease to exist.

Packet filtering firewall advantages

Packet filtering firewall disadvantages

Packet filtering may not provide the level of security necessary for every use case, but there are situations in which this low-cost firewall is a solid option. For small or budget-constrained organizations, packet filtering provides a basic level of security that can provide protection against known threats. Larger enterprises can also use packet filtering as part of a layered defense to screen potentially harmful traffic between internal departments.

2. Circuit-level gateway

Using another relatively quick way to identify malicious content, circuit-level gateways monitor TCP handshakes and other network protocol session initiation messages across the network as they are established between the local and remote hosts to determine whether the session being initiated is legitimate — whether the remote system is considered trusted. They don’t inspect the packets themselves, however.

Circuit-level gateway advantages

Circuit-level gateway disadvantages

While circuit-level gateways provide a higher level of security than packet filtering firewalls, they should be used in conjunction with other systems. For example, circuit-level gateways are typically used alongside application-level gateways. This strategy combines attributes of packet- and circuit-level gateway firewalls with content filtering.

3. Application-level gateway

This kind of device — technically a proxy and sometimes referred to as a proxy firewall — functions as the only entry point to and exit point from the network. Application-level gateways filter packets not only according to the service for which they are intended — as specified by the destination port — but also by other characteristics, such as the HTTP request string.

While gateways that filter at the application layer provide considerable data security, they can dramatically affect network performance and can be challenging to manage.

Application-level gateway advantages

Application-level gateway disadvantages

Application-layer firewalls are best used to protect enterprise resources from web application threats. They can both block access to harmful sites and prevent sensitive information from being leaked from within the firewall. They can, however, introduce a delay in communications.

4. Stateful inspection firewall

State-aware devices not only examine each packet, but also keep track of whether or not that packet is part of an established TCP or other network session. This offers more security than either packet filtering or circuit monitoring alone but exacts a greater toll on network performance.

A further variant of stateful inspection is the multilayer inspection firewall, which considers the flow of transactions in process across multiple protocol layers of the seven-layer Open Systems Interconnection (OSI) model.

Stateful inspection firewall advantages

Stateful inspection firewall disadvantages

Most organizations benefit from the use of a stateful inspection firewall. These devices serve as a more thorough gateway between computers and other assets within the firewall and resources beyond the enterprise. They also can be highly effective in defending network devices against particular attacks, such as DoS.

5. Next-generation firewall

A typical NGFW combines packet inspection with stateful inspection and also includes some variety of deep packet inspection (DPI), as well as other network security systems, such as an IDS/IPS, malware filtering and antivirus.

While packet inspection in traditional firewalls looks exclusively at the protocol header of the packet, DPI looks at the actual data the packet is carrying. A DPI firewall tracks the progress of a web browsing session and can notice whether a packet payload, when assembled with other packets in an HTTP server reply, constitutes a legitimate HTML-formatted response.

NGFW advantages

NGFW disadvantages

NGFWs are an essential safeguard for organizations in heavily regulated industries, such as healthcare or finance. These firewalls deliver multifunctional capability, which appeals to those with a strong grasp on just how virulent the threat environment is. NGFWs work best when integrated with other security systems, which, in many cases, requires a high degree of expertise.

Firewall delivery methods

As IT consumption models evolved, so too did security deployment options. Firewalls today can be deployed as a hardware appliance, be software-based or be delivered as a service.

Hardware-based firewalls

A hardware-based firewall is an appliance that acts as a secure gateway between devices inside the network perimeter and those outside it. Because they are self-contained appliances, hardware-based firewalls don’t consume processing power or other resources of the host devices.

Sometimes called network-based firewalls, these appliances are ideal for medium and large organizations looking to protect many devices. Hardware-based firewalls require more knowledge to configure and manage than their host-based counterparts.

Software-based firewalls

A software-based firewall, or host firewall, runs on a server or other device. Host firewall software needs to be installed on each device requiring protection. As such, software-based firewalls consume some of the host device’s CPU and RAM resources.

Software-based firewalls provide individual devices significant protection against viruses and other malicious content. They can discern different programs running on the host, while filtering inbound and outbound traffic. This provides a fine-grained level of control, making it possible to enable communications to/from one program but prevent it to/from another.

Cloud/hosted firewalls

Managed security service providers (MSSPs) offer cloud-based firewalls. This hosted service can be configured to track both internal network activity and third-party on-demand environments. Also known as firewall as a service, cloud-based firewalls can be entirely managed by an MSSP, making it a good option for large or highly distributed enterprises with gaps in security resources. Cloud-based firewalls can also be beneficial to smaller organizations with limited staff and expertise.

difference between firewall and proxy server

Both firewall and proxy servers work towards a common goal and that is limiting or blocking connections to or from a network. Both of them provide security against the network threats and reside between the local computer and the network. But then what is the difference between firewall and proxy server?

The difference between a firewall and a proxy server arises in the purpose and working of both. A firewall simply blocks access to unauthorized connections while a proxy server sits as a mediator between a local computer and the internet. But exactly what is a firewall and proxy server? Let us find out this, in the next part of this blog!

In this article let us look at:

A) What is a Firewall?

A firewall is a software or application that protects a local network of computers or devices by limiting or blocking access to some unauthorized users sitting outside the network. It works at an IP packet level and can filter data packets entering into a private network. A data packet can enter a network only if the firewall allows it to enter. It is a full-proof barrier for monitoring, protecting, and auditing the local computer network from external security threats.

How does a firewall work?

There are specific access control policies or rules set by the administrator that governs what data packet is allowed and what is not. These rules are known as the access control list. This list may contain allowed and denied port numbers, internet protocol used by the request, and IP addresses. This list is customizable and the network administrator can, not only prevent what can enter the network but also what leaves a network. And this is how security is ensured in a private network. An example of an access control list is shown below:

The usefulness of a Firewall

B) What is a Proxy Server?

A proxy server is a device or a program that improves and secures access to a website. To do so, it acts as a barrier between the local computer and the Internet. This avoids direct communication between the local computer and the internet. It uses an anonymous IP address instead of the original one. So no external user can view the local computer’s IP address because only the proxy server IP address is visible. This ensures safety from malicious users sitting outside the network.

How does a proxy server work?

When a user wants to access a particular site on the Internet, the request is sent to a proxy server. It then searches the cache and looks up for the same request. If the request is available in the cache, it is produced right away saving the bandwidth. If it is not in the cache, the proxy accesses the internet and produces the result and stores it in the cache as well.

The usefulness of a proxy server

So by reading about what is firewall and proxy server, it is clear that the difference between a firewall server and the proxy server is just at the level of functioning and purpose. Otherwise, they work with the sole motive of protecting a local network from malicious users and activities.

Difference between Proxy Server and Firewall

Firewalls are commonly used to prevent unauthorized network access. Uninterruptible Power Supply (UPS) With a firewall, only authorized users can connect to a server on the organization’s network. A firewall may also restrict outbound connections. 
Firewalls protect against unauthorized connections. When configuring Interchange, consider firewalls. 
A proxy server on your network may also be required for outbound HTTP messages to the Internet. Your messages may need to pass through a proxy server on your partner’s network. 
Even though all proxy firewalls are also proxy servers, not all proxy servers are also proxy firewalls and vice versa. They both act as a go-between for servers and their respective customers. The ability to cache web pages to reduce network congestion is shared by the two programs, and both can keep information about the user hidden from the server. Using a proxy firewall, network traffic is subjected to a more thorough examination to detect and protect against potentially malicious traffic.

For outbound and incoming traffic.

Outbound – Your firewall must allow outbound HTTP traffic on the port specified in your partner’s URL (for example, 4080). Your partner’s firewall must allow inbound HTTP traffic on the specified port. 
You may want to restrict outgoing HTTP traffic on this port to only your partner’s IP address in highly secure environments. 
Your firewall needs to be updated if the IP address of your partner changes or if you add new partners. Those who choose to restrict traffic from specific IP addresses, such as your business partners, are doing the same thing you are. 
Inbound – Like outbound traffic, inbound traffic has firewall considerations. You can either allow all inbound traffic on a specific port, like 4080 or specify per-partner firewall rules based on each partner’s IP address. 
Defining partner-specific firewall inbound rules protects against denial-of-service attacks. However, as with partner-specific outbound firewall rules, changing IP addresses or adding partners imposes a firewall maintenance burden.


By now, we have clearly stated the firewall and proxy server definition, their usefulness, and what is the difference between proxy and firewall. Deciding about what to include to protect your private network: proxy server vs firewall? But do you know the proxy server and firewall can work in integration? A proxy server is a part of the firewall which when used together with the firewall provides more efficiency and feasibility.

By efficiency we mean, they reduce the risk of a Cyberattack, hacking, or IP spoofing. These kinds of attacks mainly aim to enter into the system employing multiple password attempts hoping that one of them is valid. Systems are generally targeted by automated bots and if they succeed they can destroy the system by wiping off your crucial data completely.

So, it is better to follow all the security measures and avoid a security breach. Happy computing! In case, you are interested in Cyber Security then browse through our Master Certificate in Cyber Security (Blue Team), a 520 hours long program with preparation for 7 global certifications.

Leave a Comment