Kerry CorderoPractical Network Engineering Notes
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Troubleshooting

Data CenterRouting & Switching

MTR Explained: Per-Hop Loss, Protocol Selection, and Bidirectional Testing

A throughput test tells you that a path is slow. It does not tell you where the problem is. mtr...
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Laptops & DesktopsRouting & SwitchingSecurityServers

Using Chrome’s Net Export Tool for Network Diagnostics

As network engineers, we often find ourselves at the crossroads of application and infrastructure troubleshooting. While packet captures and network...
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Data CenterServers

The Challenge of 503 Service Unavailable Errors in IIS

Many organizations use Internet Information Services (IIS), a robust web server. However, administrators and developers often encounter 503 Service Unavailable...
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Security

Palo Alto – Understanding Panorama Template Push Icons

When using Palo Alto Networks’ Panorama for centralized management of firewall configurations, it’s essential to understand the various icons and...
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Routing & Switching

MTR vs Iperf Network Diagnostics and Performance Tools

MTR and Iperf are tools used in network diagnostics and performance measurements, but they focus on somewhat different aspects of...
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Servers

HTTP Status Code and IIS Configuration Troubleshooting Guide

HTTP Status Codes are three-digit numbers returned by a web server (like IIS) in response to an HTTP request from...
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Security

Troubleshooting ECDH vs. RSA: A Comparative Approach

When talking about the key differences between ECDH and RS, your approach to troubleshooting TLS issues is generally the same....
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Routing & Switching

TCP Handshakes – 3 Way, 4 Way, 5 Way, and Simultaneous Open

TCP handshakes are integral to the establishment of connections in network communications. Most network engineers are well-acquainted with the traditional...
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CloudRouting & Switching

Troubleshooting AWS Direct Connect Performance: What iperf3 and MTR Can and Cannot Tell You

Direct Connect performance complaints usually arrive in the same form: the circuit is 1 Gbps, the transfer is running at...
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Security

Palo Alto – Category Testing and Decryption

Using CLI Commands “test security-policy-match” & “test decryption-policy-match” test security-policy-match command allows you to determine which security policy rule would...
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  • Home
  • About
  • Disclaimer
  • Guides and Slides
    • AWS Well-Architected Framework
    • Facebook – Running BGP in the Data Center at Scale
    • Microsoft – Experiences with BGP in Large Scale Data Centers
    • Palo Alto PCNSE Study Guide
  • Tools
    • Car Calculator
    • RouteAgg
    • IP Calculator
    • VSLM
  • Links
  • Contact

Categories

  • AI
  • Business Management
  • Cloud
  • Code
  • Data Center
  • Laptops & Desktops
  • Load Balancing
  • Routing & Switching
  • Security
  • Servers
  • Uncategorized
  • VOIP
  • Wireless

Tags

Active Directory (AD) AWS Best Practices BGP Certificates Cisco Cisco ACI Cisco ASA Cisco ASR Cisco Catalyst Cisco CLI Cisco ISE Cisco Nexus Cisco Stack DDOS Design DNS EIGRP F5 HTTP(S) IP Addressing and Subnetting Microsoft IIS Microsoft SQL Microsoft Windows Netflow OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS snmp Spanning-Tree Splunk SSL Structured Cabling TLS Troubleshooting Upgrade VMWare Zscaler
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