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What Is a Next-Generation Firewall?

eSecurity Planet

A next generation firewall (NGFW) performs deep packet inspection to check the contents of the data flowing through the firewall. Unlike more basic firewalls that only check the header of data packets, NGFWs examine and evaluate the payload data within the packet. Who Needs a Next-Gen Firewall?

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Complete Guide to the Types of DDoS Attacks

eSecurity Planet

Distributed denial-of-service (DDoS) attacks occur when attackers use a large number of devices to attempt to overwhelm a resource and deny access to that resource for legitimate use. The very first DDoS attacks occurred when network engineers misconfigured networks and overwhelmed components by accident. Volumetric DDoS Attacks.

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What Is Stateful Inspection in Network Security? Ultimate Guide

eSecurity Planet

Stateful inspection is a firewall feature that filters data packets based on the context of previous data packets. This important feature uses header information from established communication connections to improve overall security. Table of Contents Toggle How Does Stateful Inspection Work? Stateless protocols (UDP, HTTP, etc.)

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What Is DNS Security? Everything You Need to Know

eSecurity Planet

The DNS protocol was designed for use within a firewall on a secure network, and by default will communicate in plain text. A modern computing environment includes branch offices, remote workers, and mobile devices that must reach DNS servers from outside the firewall.

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How to Prevent DNS Attacks: DNS Security Best Practices

eSecurity Planet

Design robust server architecture to improve redundancy and capacity for resilience against failure or DDoS attacks. Firewalls should be hardened to close unneeded ports. Implement rate limiting to harden against DDoS and DNS tunneling attacks. to help prevent its cache from being poisoned by hackers.

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What Is Packet Filtering? Definition, Advantages & How It Works

eSecurity Planet

Packet filtering is a firewall feature that allows or drops data packets based on simple, pre-defined rules regarding IP addresses, ports, or protocols. Once a type of firewall, packet filtering now provides a fundamental feature of nearly all firewalls and some network equipment (routers, smart switches, etc.).

Firewall 109
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What Is a Circuit-Level Gateway? Definitive Guide

eSecurity Planet

A circuit-level gateway (CLG) is a firewall feature that acts as a proxy and filters packets based on session information. CLGs are important because they provide specialized security filtering and prevent the discovery of IP addresses and open ports on CLG-protected devices.

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