Glossary 🌐 Network

Network Security

Firewalls

Devices or software that allow or block network traffic based on set rules.

A firewall waves through traffic that follows the rules and blocks the rest.

Why this matters

A poorly separated office network can let one compromised device, like a smart camera or guest laptop, reach your important systems.

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Palo AltoFortinetCisco

More in Network

Next-Generation Firewalls (NGFW)Firewalls that also recognize applications and users and can inspect traffic for threats, not just ports and addresses.IDS (Intrusion Detection)An Intrusion Detection System watches network traffic for signs of attack and raises alerts, without blocking it.IPS (Intrusion Prevention)An Intrusion Prevention System inspects traffic like an IDS but can automatically block suspected attacks as they happen.Network segmentationSplitting a network into separate zones so a problem in one area cannot easily spread to others.VLANsVirtual Local Area Networks divide one physical network into separate logical networks, such as staff, guest, and devices.NAC (Network Access Control)Checks devices before they join the network and blocks or limits ones that are unknown or not up to standard.VPNA Virtual Private Network creates an encrypted connection so remote users can reach company systems more safely.Secure Web GatewayFilters users' web traffic to block malicious or unwanted websites and downloads.DDoS protectionAbsorbs or filters floods of junk traffic (Distributed Denial of Service) meant to knock a website or service offline.

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