Kerry CorderoKISS IT Design Principle - Human Error Prevention
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Kerry Cordero
JoinedMay 2, 2023
Articles649
20+ years of experience and proven performance in large scale enterprise network infrastructure architecture, design, implementation, migration, security, operation, troubleshooting, leading/managing teams, and budgets. I have a BS in Cybersecurity and a Master's from the University of Florida.
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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Routing & Switching

Cisco Nexus CLI – Find Fiber Length for Transceiver Used

Cisco can tell you the length of fiber compatible with the Transceiver you are using. sh int e1/1 transceiver Ethernet1/1...
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Data CenterServers

Accelerating SAN Design: Embracing NVMe SSDs and Modern Connectivity

The Cutting-Edge of Storage Performance Storage Area Networks (SANs) are the backbone of today’s data-centric enterprises, driving the performance of...
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Security

Palo Alto GlobalProtect Timeout Settings

Below are a couple of timeouts but Login Lifetime will disconnect your end users no matter what. If it’s set...
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Business ManagementCloudCodeData CenterLaptops & DesktopsLoad BalancingRouting & SwitchingSecurityServersVOIPWireless

The Crucial Role of Vendor Relationships in IT Infrastructure Management

In a landscape as interconnected as Information Technology, the adage by John C. Maxwell, “Teamwork makes the dream work…” perfectly...
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Cloud

F5 Distributed Cloud Network Cloud Public IP Addresses

We strongly recommend verifying that your network allows connections to the IP addresses or domains listed in this document. If...
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Business Management

IT Change Control – Don’t work on Assumptions “no news is good news”

In IT, the assumption that “no news is good news” when it comes to production changes can be a dangerous...
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Data CenterServers

Understanding RAID Rebalance: Ensuring Optimal Performance and Data Protection

In the world of data storage, a Redundant Array of Independent Disks (RAID) stands out as a cornerstone technology for...
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Security

Transition from Certificate Classes to DV, OV, and EV

Historically, certain Certificate Authorities (CAs) utilized a “Class” system to categorize digital certificates. For instance, VeriSign classified them as: Class...
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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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© 2025 cordero.me • All Rights Reserved
  • 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
  • IP Calculator
  • Links
  • Contact

Categories

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

Tags

Active Directory (AD) API AWS Azure 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 Logging macOS Microsoft IIS Microsoft SQL Microsoft Windows OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS Splunk SSL Structured Cabling TLS Troubleshooting Upgrade VMWare
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