#cisco

Mengedit ACL yang Sudah Diterapkan pada Router

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Penerapan ACL 2

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Stop Writing Fragile SSH Scripts: Scaling Cisco Network Automation with Python and Nornir

Moving beyond sequential loops: A production-ready approach to inventory management, concurrency, and state validation.

Tutorial Prático: Construindo sua Primeira Rede Local (LAN) no Cisco Packet Tracer

O universo de Redes de Computadores é a base de toda a infraestrutura digital moderna. Seja para conectar pequenos dispositivos em um…

Architecting a Carrier-Grade MPLS Backbone for CRTV: A Multi-Site L3VPN Implementation

When managing the digital infrastructure for a national broadcaster at Cameroon Radio Television (CRTV), the network is more than just a…

Struktur Perintah ACL di Cisco Packet Tracer

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Penerapan ACL di Cisco Packet Tracer

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Access Control List: Buku Aturan Satpam Jaringan

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Why Technology Rollouts Fail — And It’s Never the Technology

The Spreadsheet Trap

The Ongoing Security Risks of Internet-Exposed Cisco IOS Management Interfaces

Recently, the CISA and the NSA warned that Russian state-sponsored threat actors continue to target vulnerable or misconfigured network…

How to Stop a Rogue Switch from Melting Your Network

Welcome to part 6 of our IT/OT Series (IOS), where we are building a self-healing, loop-free topology using RSTP and BPDU Guard.

How to Stop Hackers from Cloning Your IP Address at the Hardware Level

Welcome to part 5 of our IT/OT Series (IOS), where we transform our Cisco multilayer switch from a passive network router into an active…

How to Automate Your Network and Keep the Internet Out

Welcome to part 4 of our IT/OT Series (IOS), where we transition our isolated Layer 3 routing fabric from tedious manual configurations…

How to Survive a Switch Crash and Engineer Layer 3 Routing

Welcome to part 2 of our IT/OT Series (IOS), where we work with a Cisco SF-300–24P 10/100 PoE Managed Switch to setup inter-VLAN routing in…

GRE over IPsec Explained: Crypto Map vs Tunnel Protection with Packet Flow and Real Use Cases

1. Introduction

Network Troubleshooting #2: Why EtherChannel Fails Due to Protocol Mismatch? — Static vs. LACP

Good day, Network Detectives! Welcome to the second case in our ‘Network Troubleshooting’ series. Today, we’re not just solving a problem…

PPPoE Server Lab with Cisco BRAS-Style Termination, VLAN Distribution, and MikroTik NAT

A lab project that simulates a PPPoE-based broadband access network using a Cisco PPPoE Server as the subscriber termination point, Cisco…

QinQ over MPLS Lab with MikroTik and Cisco

QinQ over MPLS Lab with MikroTik and Cisco

Why Selling Your Used Cisco Equipment Is Smarter Than Letting It Gather Dust

Every year, businesses upgrade their networks. New switches are installed, routers are replaced, and firewalls are upgraded to keep pace…

Cisco Unified CM CVE-2026–20230 SSRF Actively Exploited

Cisco has confirmed active exploitation of CVE-2026–20230, a critical Server-Side Request Forgery (SSRF) vulnerability in Cisco Unified…

Cisco Network Engineer

I have around 8+ years of experience in networking domain. In India this job will be considered as private IT job. It pay’s well to get…

Le modèle n’a pas demandé une puce, mais un site

Equinix, Cisco et NVIDIA montrent une chose simple : l’IA enterprise ne passe pas en production toute seule. Elle a besoin d’une usine…

Analyzing Root Privilege Escalation in Cisco Catalyst SD-WAN Manager

In June 2026, CVE-2026–20245, a privilege escalation vulnerability that can lead to root-level command execution in Cisco Catalyst SD-WAN…

The Tunnel That Came Back to Life

The incident seemed straightforward.

Mastering Cisco IOS Command Modes

Cisco IOS (Internetwork Operating System) uses a hierarchical command-line interface (CLI) structure to organize administrative tasks by…

From Classroom Theory to Real Networks: My Week Exploring Switches, Access Points, and Trunking

Routing Without a Router: Using Layer 3 SVIs to Support a Hardware-Starved Branch Network

What happens when a branch office needs full network segmentation but the hardware budget ran dry before a router ever showed up?

From Cables to Convergence

From VLANs to OSPF: What Week 6 Taught Me About Enterprise Networking

Demystifying the Core Protocols of a Flat LAN

CISCO NETWORKING FOUNDATIONS LAB HANDBOOK

Moving the Network While It’s Still Running

This article was originally published on LinkedIn on June 9, 2026

What Actually Changes in Cisco Nexus 93180YC-FX3 for EVPN Leaf-Spine Deployments

In large-scale VXLAN EVPN fabrics, most performance issues are rarely caused by routing protocol design. Instead, they tend to surface at…

Configuring Cisco ASA (Adaptive Security Appliance) Firewall & Troubleshooting — HomeLab #4

We are continuing our Homelab series with our fourth lab: Setting up a Firewall. Just like before, we will build this lab on top of our…

Cisco Certified Support Technician (CCST) IT Support: A Smart First Step into an IT Career in…

The demand for skilled IT support professionals continues to grow across Australia as businesses rely heavily on technology to support…

Cisco Systems, Inc. (CSCO)

AI Infrastructure at an Inflection: The Network Is Back

Cisco VPN Client Silent Installation for SCCM 2007 & 2012 Distribution

Building a Cisco ASA Firewall Lab in Packet Tracer: From Timeouts to a Working NAT and ACL Setup

I started this lab with a simple idea: build a Cisco ASA firewall setup in Packet Tracer with one inside network, one outside network, and…

Are established giants like Nokia collectively hitting new highs?

Key points:

Cisco Switching And Vlan

Securing and Connecting the Network: ACL, NAT, and PAT Overload — HomeLab #3

Welcome back to my HomeLab series! This is the third part of our network journey. In our first two labs, we built a local network with…

VLANs

Ever wondered how large organizations keep thousands of devices connected without turning their network into a chaotic mess?

Connecting Isolated Networks: Inter-VLAN Routing with Router-on-a-Stick | Homelab #2

In my previous article, we successfully isolated the Accounting and IT departments using VLANs to increase security. However, in real-world…

Erik Szczechura — Engineering Experience and Professional Background

In today’s fast-evolving technical environment, maintaining reliable systems and infrastructure requires both practical experience and…

Isolate Network Traffic: A Guide for VLANs & Trunking Using Cisco CLI — HomeLab #1

In today’s cybersecurity and networking landscape, understanding how to secure and segment network traffic is a fundamental skill. Without…

AI Traffic Reshapes Wide Area Networks

The landscape of Wide Area Networks is undergoing a significant transformation, propelled by the emergence of artificial intelligence agents

Ağ Güvenliğinin Kör Noktası: Cisco Cihazlarında Tehdit Avcılığı ve Bir NSPM Platformunun Doğuşu…

Kurumsal ağlarda sunucular EDR/XDR ile korunurken, router, switch ve firewall’lar siber güvenlikte kara kutu olarak kalıyor. Bu yazı…

Scaling an AI Network Assistant with Inventory and SQLite

In my previous story — https://medium.com/@aks001235/building-an-mcp-based-ai-network-engineer-with-python-b93fdbcce810 , I built a small…

Enterprise Monitoring: Upgrading Zabbix Infrastructure and Integrating Cisco 9800 WLC SNMP…

Managing an enterprise network infrastructure requires absolute visibility. When you are responsible for monitoring hundreds of switches…

The Titans of Enterprise Infrastructure: A Unified Blueprint for the Hybrid Multi-Cloud Era

Introduction :

Cisco Open-Sources Agentic AI Security Specification

Cisco released an internally developed specification for agentic AI security evaluation to the GitHub open-source community.