Cloud Firewall Explanation | Firewall-as-a-Service

What is Cloud Firewall? | Firewall-as-a-Service: Despite the lack of a clearly defined network boundary, a cloud firewall secures cloud infrastructure. Learn how they operate and what sets them apart from next-generation firewall (NGFWs).

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What is Cloud Firewall?
What is Cloud Firewall?

Learning Outcomes of Cloud Firewall Explanation

You will be able to do the following after reading this article:

  1. Learn what a cloud firewall is and how to use it.
  2. Investigate how cloud computing affects network perimeters.
  3. Learn how cloud firewalls vary from traditional firewalls.
  4. Distinguish between next-generation firewalls and cloud firewalls.
  5. What does ‘Firewall-as-a-Service’ mean?

What is a Cloud Firewall?

Commercial Banks have a high level of physical security. Security measures like as security cameras and bulletproof glass will be standard in most brick-and-mortar institutions. Potential criminals are deterred by security guards and bank personnel, and cash is kept in extremely guarded safes. See financial industry and cloud computing.

Consider what would happen if, instead of being held in one location, each bank branch’s cash was housed in several safes around the country, all of which were managed by a business that specialised in safe maintenance. Without putting extra security personnel around its dispersed safes, how could the bank be sure that its money was safe? Cloud firewalls do this.

Cloud firewall security illustration
Cloud firewall security illustration

The cloud functions similarly to a bank with dispersed resources, except instead of money, it stores data and computing power. Authorized users can access the cloud from virtually any location and across almost any network. Applications that operate in the cloud, as well as cloud platforms and infrastructure, may be executed from anywhere.

Cyber attacks aimed at these cloud assets are blocked by cloud firewalls. A cloud firewall, as the name suggests, is a firewall that is hosted on the cloud. Traditional firewalls establish a virtual barrier around an organization’s internal network, whereas cloud-based firewalls form a virtual barrier across cloud platforms, infrastructure, and applications. Deploying a cloud firewall is similar to replacing a bank’s local security cameras and physical security guard with a worldwide 24/7 security centre with a centralised staff and security camera feeds from all of the locations where the bank’s assets are kept.

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What is a Firewall?

Basically, a firewall is a type of security software that detects and blocks harmful communications. Firewalls have traditionally been placed between a trusted internal network and an untrusted network, such as a private network and the Internet. Physical equipment attached to an organization’s on-premises infrastructure were the first firewalls. Firewalls use an internal set of rules to restrict and accept network traffic. Administrators can alter these rules in some firewalls.

What is a Firewall? The public and private firewall illustration
What is a Firewall? The public and private firewall illustration

However, as cloud computing becomes more popular, the line between a trusted network and the broader Internet is blurring, necessitating the use of cloud firewalls to create a virtual barrier between trusted cloud assets and untrustworthy Internet traffic.

Firewall-as-a-Service (FWaaS): What does mean?

Cloud firewalls are sometimes known as firewalls-as-a-service, or FWaaS for short. A FWaaS, like other “as-a-Service” categories like Software-as-a-Service or Platform-as-a-Service, operates in the cloud and is accessed through the Internet, and it is provided as a service by third-party vendors that update and support it.

What is the difference between a cloud firewall and a next-generation firewall (NGFW)?

A next-generation firewall (NGFW) is a firewall that incorporates new features not seen in previous firewall solutions, such as:

  • Intrusion prevention system (IPS): detects and stops cyber assaults.
  • Deep packet inspection (DPI): NGFWs look at both the headers and the payload of data packets, rather than simply the headers. This assists in the detection of malware and other harmful data.
  • Application control: NGFWs can restrict access to specific apps or completely ban them.

Other advanced features may be available with NGFWs.

The phrase “next-generation firewall” is used loosely, however NGFWs aren’t always cloud-based. An NGFW might be a cloud-based firewall, but it could also be an on-premises firewall.

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What is the network perimeter? How does cloud computing affect the network perimeter?

The network perimeter is the line that separates an organization’s internal network from network access supplied by an outside vendor, generally an Internet service provider (ISP). The network perimeter, in other words, is the limit of what an organisation can regulate. Networks can also be physically closed down: to connect to the business network, an employee may need to be in the workplace and using a company-managed device. Firewalls were created to keep this sort of network border secure and prevent harmful traffic from entering.

The network boundary almost vanishes with cloud computing. Users have unrestricted access to services over the Internet. The geographical location of a person, as well as the device they’re utilising, are no longer relevant. It’s tough to build a layer of protection over company resources because determining where the security layer should go is nearly impossible. Some organisations combine a variety of security solutions, such as conventional firewalls, VPNs, access control, and intrusion prevention systems (IPS), but this adds a lot of complexity to IT and makes it difficult to administer.

How do cloud-based firewalls fit into a SASE framework?

SASE is a cloud-based networking architecture that integrates networking operations, such as software-defined WANs, with a suite of security services, including FWaaS. Unlike traditional networking architectures, which need on-premise firewalls to secure the perimeter of data centres, SASE provides full security and access control at the network edge.

Cloud-based firewalls operate in collaboration with other security solutions to protect the network perimeter against assaults, data breaches, and other cyber threats in a SASE networking paradigm. Companies may employ a single provider that integrates FWaaS, cloud access security brokers (CASB), secure web gateways (SWG), and zero trust network access (ZTNA) with SD-WAN capabilities. This can be done rather than hiring numerous third-party suppliers to implement and manage each service.

What does the Cloud Web Application Firewall do?

The Cloud Web Application Firewall (WAF) protects cloud properties against exploits, assists in the prevention of DDoS assaults, and allows IT administrators to create custom firewall rules. A Cloud WAF may be deployed in front of any form of cloud deployment, including hybrid cloud, multicloud, public cloud, and so on.


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