Firewall

How it is used

Network and security teams talk about firewall rules, firewall policies and opening or closing ports on the firewall. Adding a rule usually needs a change request. Products that also inspect applications are called next-generation firewalls (NGFW).

Example sentences

1. Can you open port 443 on the firewall for the new web server?

2. The firewall blocked several connection attempts from an unknown IP range.

Common collocations

• firewall rule
• firewall policy
• next-generation firewall
• configure a firewall
• behind the firewall

Related terms

• network segmentationDividing a network into separate zones, with controlled traffic between them, so that a problem in one part cannot easily spread to the others.
• web application firewallA firewall that sits in front of web applications and filters HTTP traffic to block common web attacks such as SQL injection and cross-site scripting.
• open portA network port on a device that is accepting connections, which means a service is listening there and can be reached by others.
• intrusion detection systemA tool that monitors network traffic or system activity for signs of attacks or policy violations and raises an alert when it finds them.
• VPNVirtual private network: a technology that creates an encrypted connection over the internet so that remote users or offices can reach a private network safely.

This word in other fields

The same English word can have a different meaning in another field:

• firewall · Cybersecurity
• firewall · Networking & Telecommunications

More terms: APIs, Networking and Security

• API
• endpoint
• REST
• JSON
• status code
• payload
• authentication
• third-party
• SDK
• breaking change
• request
• response