Explore the world of networking with expert insights on routers, switches, and firewalls. This category is your go-to resource for troubleshooting tips, configuration guides, and practical skills to optimize and secure your network. Whether you’re a beginner or a seasoned IT pro, find step-by-step solutions to keep your systems connected and running smoothly.
DPD is not exclusively for NAT-T (NAT Traversal) traffic. DPD operates at the IKE (Internet Key Exchange) level and is […]
Is Dead Peer Detection (DPD) Only for NAT-T Traffic? Read Post »
Once got your CISSP—or you’re gearing up to tackle cybersecurity like a pro. Either way, it’s time to get technical.
20 things you have to know once you got CISSP Read Post »
What is Dead Peer Detection (DPD)? Dead Peer Detection (DPD) is a mechanism used in IPsec VPNs to determine whether
Deep into Dead peer detection and NAT-T of ipsec VPN Read Post »
I’ll explain each one step-by-step, structured logically to help you understand their purpose, how they fit into the IPsec framework,
What you should know about ipsec vpn? Read Post »
What Can a Hacker Do with a Reverse Shell? When the reverse shell connects back to the attacker, it’s like
What Can a Hacker Do with a Reverse Shell? Read Post »
A reverse shell is a crafty technique hackers (and ethical testers) use to remotely control a system. Unlike a typical
Understanding Reverse Shells: How They Work on Linux, Windows, and macOS Read Post »
We’ve hit an odd snag with our Palo Alto PA-820 firewall, which serves as the core of our IPsec VPN
IPsec VPN Instability on Palo Alto PA-820: A Multi-Site Mystery Read Post »
Just set up Cisco Secure Network Analytics (Stealthwatch) and wondering how to spot trouble in your network? You’re not alone!
Backdoor hacking tools are a type of malicious software or mechanism designed to provide unauthorized access to a system, network,
What are backdoor in cyber security? Read Post »
What is a Certificate? A certificate (specifically an X.509 certificate in the context of TLS/HTTPS) is a digital document that
What you should know about certificate? Read Post »
Overview of TLS 1.3 TLS 1.3 (Transport Layer Security version 1.3) is a cryptographic protocol that secures communication between two
What you should know about TLS 1.3, how it secure your data for web browsing? Read Post »
Transport Layer Security (TLS) ensures secure communication over the internet, evolving significantly across versions. TLS 1.1 (2006) introduced basic encryption,
Let’s dive into how the key exchange works in HTTPS, focusing on the interplay between asymmetric and symmetric encryption, and
Key exchange method in https Read Post »
HTTPS (Hypertext Transfer Protocol Secure) is HTTP layered over a secure protocol (typically TLS, or Transport Layer Security, formerly SSL).
What is HTTPS and how it works? Read Post »
What Are TCP, UDP, and QUIC? Before we compare them, let’s define each protocol: Now, let’s break down how they
What Are TCP, UDP, and QUIC? Read Post »
MTU (Maximum Transmission Unit) and MSS (Maximum Segment Size) are two important concepts in networking, particularly in the context of
What’s Nmap? Nmap (Network Mapper) is like a lazy guy’s spy kit—it scans networks, finds devices, and tells you what’s
Nmap for Network Scanning, for beginniner Read Post »
In the realm of application-layer security, two tools stand out: the Web Application Firewall (WAF) and the Layer 7 Firewall.
What you should know in WAF and Layer7 firewall? Read Post »
IPsec VPNs are critical for securely connecting distributed sites, such as a core office with a Palo Alto PA-820 firewall
How to Troubleshoot IPsec VPN Issues: Step-by-Step Guide for Palo Alto 820 Read Post »
In a previous analysis, detailed in The Curious Case of Deny Logs in Palo Alto SSL Decryption: A Troubleshooting Journey
Investigating PAN-273949: A Potential Resolution for SSL Decryption Deny Log Anomalies Read Post »
Let’s set up a lab to configure a Cisco VXLAN EVPN-BGP fabric with a spine-leaf topology, including normal leaf switches
Lab to configure a Cisco VXLAN EVPN-BGP fabric with a spine-leaf topology Read Post »
Let’s dive into setting up a Cisco switch using Python automation! This is a great way to streamline network configuration
Setting Up a Cisco Switch with Python Automation Read Post »
I recently added Cloudflare CDN to my WordPress site on Linode, updated GoDaddy nameservers to Cloudflare, and bam—every link hit
Cloudflare Flexible SSL vs. Full SSL: Fixing WordPress 301 Redirect Loops Read Post »
If you’re familiar with Cisco’s Management VRF, where management traffic is isolated into a separate routing domain, you might wonder
Configuring Fortinet Firewall Outbound Management: Cisco Mgmt VRF Equivalent Read Post »
For three relentless days—24 hours non-stop—I served on the blue team during a government cybersecurity drill that pushed us to
Share a real world cyber security drill Read Post »
Key Points What Cisco Secure Network Analytics Does Cisco Secure Network Analytics is a tool that watches your network like
How Cisco NDR to discover network activity? Read Post »
As a network engineer managing a mixed environment—Cisco, Juniper, FortiADC, and AWS CDN—I recently hit a head-scratcher that didn’t have
FortiADC TLS Mismatch with Backend Servers: A Real-World Troubleshooting Case Read Post »
How I Fixed the “XML Declaration Allowed Only at the Start of the Document” Error in Yoast SEO Sitemap If
Traffic flow: AWS > Firewall > reverse proxy > Paloalto > Load balancer > Backend server If you’ve ever stared
The Curious Case of “Deny” Logs in Palo Alto SSL Decryption: A Troubleshooting Journey Read Post »
If you’re managing a FortiADC device and rely on its auto backup feature to keep your configurations safe, you might
FortiADC Auto Backup Failure to SFTP Server – A Fix in Firmware V7.6.1 Read Post »
