Production Runbooks for Network & Infra Teams
Step-by-step operational playbooks for IT, NOC, and DevOps engineers. Real commands, real configs.
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What Happens When DNS Fails (Real Impact Explained)
A technical deep-dive into DNS failure modes, their cascading impact across authentication, monitoring, and CI/CD, and step-by-step recovery procedures for infrastructure engineers.
Most Used in NOC
What Is VLAN and Why It Is Used in Cisco Networks
A comprehensive technical guide to VLANs in Cisco networks, covering what VLANs are, why they are used, and how to configure them on IOS-XE switches. Includes step-by-step CLI examples for VLAN creation, trunking, and inter-VLAN routing.
What Happens When DNS Fails (Real Impact Explained)
A technical deep-dive into DNS failure modes, their cascading impact across authentication, monitoring, and CI/CD, and step-by-step recovery procedures for infrastructure engineers.
Public vs Private DNS: Key Differences and Use Cases
A technical deep-dive into public and private DNS architecture, covering split-horizon BIND views, TSIG zone transfer security, RPZ filtering, and the design decisions that keep internal records out of public zones.
Benefits of Using HAProxy for High Availability Systems
HAProxy delivers enterprise-grade load balancing, SSL termination, health checks, and session persistence that form the backbone of resilient high availability architectures. Learn how to configure and tune HAProxy for production environments.
Command Reference Preview
! BGP Troubleshooting - Cisco IOS-XE
R1# show ip bgp summary
BGP router identifier 10.0.0.1, local AS number 65001
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.0.0.2 4 65002 1024 1020 45 0 0 01:23:45 12
10.0.0.3 4 65003 0 5 0 0 0 00:02:11 Active
R1# show ip bgp neighbors 10.0.0.3 | inc BGP state
BGP state = Active, unread input bytes = 0
R1# debug ip bgp 10.0.0.3 events
R1# clear ip bgp 10.0.0.3 softAll Runbooks
14 entriesArista vs Juniper: Which Is Better for Enterprise Networks
A deep technical comparison of Arista EOS and Juniper Junos for enterprise network deployments, covering BGP EVPN, VXLAN, MLAG, automation, QoS, ZTP, and total cost of ownership side by side.
What Is VLAN and Why It Is Used in Cisco Networks
A comprehensive technical guide to VLANs in Cisco networks, covering what VLANs are, why they are used, and how to configure them on IOS-XE switches. Includes step-by-step CLI examples for VLAN creation, trunking, and inter-VLAN routing.
Top Real-World Use Cases of Nginx in Production
A deep-dive into how Nginx is deployed in production environments, covering reverse proxying, upstream load balancing, SSL hardening, rate limiting, caching, WebSocket proxying, and security headers with annotated config examples.
How Nginx Improves Website Performance and Speed
Learn how Nginx's event-driven architecture, proxy caching, gzip compression, HTTP/2, and upstream keepalive eliminate latency and scale web infrastructure to handle high concurrent load.
Using Nginx as Reverse Proxy: Benefits and Use Cases
Learn how Nginx functions as a high-performance reverse proxy, covering SSL termination, upstream load balancing, response caching, WebSocket proxying, and path-based routing for production infrastructure.
What Is Nginx and Why It Is So Popular
Nginx is a high-performance, event-driven web server, reverse proxy, and load balancer that has become a cornerstone of modern infrastructure. Learn how it works, why it outperforms traditional servers, and how to configure it for real-world deployments.
Nginx vs Apache: Which Web Server Should You Choose
A deep technical comparison of Nginx and Apache covering event-driven vs process-based architecture, memory usage, reverse proxy performance, and configuration to help infrastructure engineers make the right choice.
Benefits of Using HAProxy for High Availability Systems
HAProxy delivers enterprise-grade load balancing, SSL termination, health checks, and session persistence that form the backbone of resilient high availability architectures. Learn how to configure and tune HAProxy for production environments.
Common HAProxy Use Cases in Modern Web Infrastructure
A hands-on guide to the most common HAProxy use cases including load balancing algorithms, TLS termination, ACL routing, rate limiting, session persistence, and high availability with Keepalived.
What Is HAProxy and How It Works in Simple Terms
HAProxy is a high-performance open-source load balancer and TCP/HTTP proxy trusted in production at massive scale. Learn how its frontend/backend model, health checks, SSL termination, ACLs, and Keepalived HA work together.
HAProxy vs Nginx: Which Is Better for Load Balancing
A deep technical comparison of HAProxy and Nginx for production load balancing, covering algorithms, health checks, SSL termination, ACLs, stick tables, rate limiting, and observability.
Public vs Private DNS: Key Differences and Use Cases
A technical deep-dive into public and private DNS architecture, covering split-horizon BIND views, TSIG zone transfer security, RPZ filtering, and the design decisions that keep internal records out of public zones.
What Is Reverse DNS Lookup and Where It Is Used
Reverse DNS lookup resolves an IP address back to a hostname using PTR records stored in the in-addr.arpa zone. This article explains how it works technically, how to configure it in BIND, and where it is actively used in production infrastructure.
For NOC & DevOps Teams
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