Search Articles — Sudonull

https://sudonull.com/szi-firewall-ids-ips-dlp-siem

Breakdown of information protection means for IB specialists: types of firewall, principles of IDS/IPS, DLP methods. Practical scenarios and deployment. Study the SZI stack for your network.

https://sudonull.com/llm-security-evolution-from-firewall-to-gaf-in-depth-analysis

How modern threats to LLM require multi-level protection. We analyze incidents of 2025-2026 and the transition to Generative Application Firewall. Learn how to protect AI systems.

https://sudonull.com/nftables-guide-setting-up-firewall-in-debian

Learn to configure nftables for server protection and network segmentation. Practical rule examples, threat models, testbeds. For sysadmin middle/senior — deploy in 30 min.

https://sudonull.com/little-snitch-linux-ebpf-firewall

Learn about the Linux version of Little Snitch: eBPF application traffic monitoring, blocking by IP/domains, web interface. Installation and comparison with OpenSnitch for developers.

https://sudonull.com/little-snitch-linux-ebpf-traffic-monitoring

Breakdown of Little Snitch for Linux: eBPF firewall with process-aware blocking, web interface and blocklists. Learn the architecture, trade-offs and production setup. Ideal for DevOps and security.

What Is a Firewall? Definition and Types of Firewall | Fortinet

https://www.fortinet.com/resources/cyberglossary/firewall

A firewall is a network security device designed to monitor, filter, and control incoming and outgoing network traffic based on …

What Is a Firewall? - Cisco

https://www.cisco.com/site/us/en/learn/topics/security/what-is-a-firewall.html

A firewall is a network security device that separates a trusted internal network from an external network deemed untrustworthy, such …

Firewall and network protection in the Windows Security app

https://support.microsoft.com/en-us/windows/security/windows-security/firewall-and-network-protection-in-the-windows-security-app

You can use the Windows Security app to view and manage the status of Windows Firewall. You can turn the firewall on or off, and …

Firewall (computing) - Wikipedia

https://en.wikipedia.org/wiki/Firewall_(computing)

2Types of firewalls. Toggle Types of firewalls subsection. 2.1Packet filter. 2.2Connection tracking. 2.3Application layer. 2.3.1Endpoint …

What is a Firewall? - Cloudflare

https://www.cloudflare.com/learning/security/what-is-a-firewall/

A firewall is a network security device or service that helps block cyber threats and protect sensitive data.

Introduction of Firewall in Computer Network - GeeksforGeeks

https://www.geeksforgeeks.org/computer-networks/introduction-of-firewall-in-computer-network/

Apr 28, 2026 · The firewall examines each packet against predefined security rules set by the organization. If the packet matches …

What is a Firewall? How Firewalls Work & Types of Firewalls

https://www.kaspersky.com/resource-center/definitions/firewall

Firewalls protect against cyber attacks by blocking malicious traffic. Learn more about how firewalls work, different types of firewalls & …

What is a Firewall? The Different Types of Firewalls - Check Point Software

https://www.checkpoint.com/cyber-hub/network-security/what-is-firewall/

A Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization’s …

What is a Firewall? | Microsoft Support

https://support.microsoft.com/en-us/windows/security/firewall/what-is-a-firewall

A firewall is what controls what is - and more importantly isn't - allowed to pass through those ports. You can think of it like a security …

What Is a Firewall? [Definition & Explanation] - Palo Alto Networks

https://www.paloaltonetworks.com/cyberpedia/what-is-a-firewall

A firewall is a network security solution that monitors and regulates traffic based on defined security rules and accepts, rejects or …