💻 IT Resources

Essential tools, commands, and references for IT professionals

⚡ Quick Reference Commands

show ip interface brief
Cisco - Show all interface IPs
show ip route
Cisco - Show routing table
show cdp neighbors detail
Cisco - Show CDP neighbors
show vlan brief
Cisco - Show VLAN assignments
show interfaces trunk
Cisco - Show trunk ports
show access-lists
Cisco - Show ACL hit counts
show ip ospf neighbor
Cisco - Show OSPF neighbors
show bgp summary
Cisco - Show BGP sessions
netstat -tlnp
Linux - Show listening ports
ss -tuln
Linux - Socket statistics
iptables -L -n -v
Linux - Show firewall rules
systemctl status [service]
Linux - Check service status

🔌 Networking

Cisco IOS Command Reference

Complete reference for Cisco IOS commands including configuration mode, EXEC mode, and troubleshooting.

Cisco Reference

OSPF Configuration Guide

Step-by-step guide for configuring single-area and multi-area OSPF on Cisco routers.

Routing OSPF

VLAN & Trunking Best Practices

Design patterns for VLAN segmentation, trunk configuration, and inter-VLAN routing.

Switching VLAN

BGP Peering Cookbook

Common BGP configurations for single-homed, dual-homed, and multi-homed scenarios.

BGP ISP

🔒 Security

Cisco ACL Cookbook

Ready-to-use ACL templates for common security scenarios including RDP, SSH, and web access filtering.

ACL Firewall

IPSec VPN Configuration Guide

Complete guide for site-to-site and remote access VPN configuration on Cisco devices.

VPN IPSec

Harden Cisco IOS Checklist

Comprehensive checklist for securing Cisco devices based on CIS benchmarks and NIST guidelines.

Hardening Compliance

Network Segmentation Patterns

Design patterns for implementing zero-trust network segmentation using VLANs, ACLs, and firewalls.

Zero Trust Design

☁ Cloud & Automation

Terraform for Network Infrastructure

Templates for provisioning network infrastructure using Terraform with major cloud providers.

Terraform IaC

Ansible Network Automation

Playbooks for automating Cisco device configuration, compliance checks, and backup.

Ansible Automation

Python for Network Engineers

Python scripts and libraries (Netmiko, NAPALM, Nornir) for network automation.

Python Scripting

Container Networking Guide

Understanding Docker networking, Kubernetes CNI, and service mesh for containerized applications.

Docker Kubernetes

💻 Systems

Linux Server Hardening

Step-by-step guide for securing Linux servers including SSH, firewall, and audit logging.

Linux Security

Active Directory Best Practices

Design principles for AD structure, Group Policy, and security configuration.

Windows AD

Monitoring Stack Setup

Guide for setting up Prometheus, Grafana, and ELK stack for infrastructure monitoring.

Monitoring Observability

Backup & Recovery Strategies

Disaster recovery planning, backup automation, and testing procedures for IT infrastructure.

DR Backup