A firewall is a security system that inspects the traffic going in and out of your network and decides which connections to allow and which to block based on defined rules. It works like the front desk of an office building: authorized visitors get through, and anything that does not meet the rules is stopped.
How TecnetOne handles it: Managed Firewall
network firewall, perimeter firewall, hardware firewall, software firewall, firewall rules
Related terms
Cloud computing
Cloud computing is the use of servers, storage and applications that a provider runs in its own data centers and that your company accesses over the internet, paying for what it uses. Instead of buying and maintaining your own hardware, you rent the capacity you need from services such as Microsoft Azure or AWS.
Shadow IT
Shadow IT is the applications, cloud services or devices employees use for work without IT knowing or approving them, such as a personal storage account or a free AI tool. It usually starts with good intentions, but it leaves company data outside of IT's control.
Virtualization and hypervisor
Virtualization is the technology that lets a single physical server work as several independent computers, called virtual machines, each with its own operating system. The hypervisor is the software that shares the hardware's resources among them, such as VMware or Hyper-V, and it is the foundation of the modern cloud.
Network segmentation
Network segmentation is the practice of dividing a company network into separate zones, for example users, servers, guests and production equipment, with rules that control what can talk to what. Microsegmentation takes the idea down to each server or application, so an incident in one zone does not spread to the rest.
CASB (cloud access security broker)
A CASB (cloud access security broker) is a tool that sits between your employees and the cloud applications they use, such as Microsoft 365 or Google Drive, to show which services are in use and enforce security rules. It helps uncover shadow IT, prevent data leaks and control who shares what.
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