Kerry CorderoKISS IT Design Principle - Human Error Prevention
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Kerry Cordero
JoinedMay 2, 2023
Articles664
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.
Routing & Switching

The Importance of Out-of-Band Management in Enterprise Networks

Out-of-Band (OOB) management plays an invaluable role in maintaining and securing a robust network infrastructure in enterprise networking. Understanding its...
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Routing & Switching

The Power of “No”: Understanding the “no bgp default ipv4-unicast” Command in BGP Configuration

When it comes to Border Gateway Protocol (BGP), there’s a myriad of configuration options available to network engineers. One command...
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Data Center

The Great Debate: Cisco FEX Single-Homed vs Dual-Homed Design

In the world of networking, choices often boil down to a trade-off between redundancy and complexity. One such debate revolves...
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Security

Palo Alto – Countries and Country Codes

COUNTRY NAME COUNTRY CODE Afghanistan AF Albania AL Algeria DZ American Samoa AS Andorra AD Angola AO Anguilla AI Antarctica...
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CloudCodeData CenterLaptops & DesktopsLoad BalancingRouting & SwitchingSecurityServersVOIPWireless

RFC 5735 – Special Use IPv4 Addresses

Before we dive into the specifics, let’s take a moment to revisit what RFCs are. Standing for “Request for Comments,”...
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Code

Python – ARIN Whois

# Author: Kerry Cordero # Version: 1.0.0 # Description: This script prompt for the ASN and output the IP Subnet...
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Routing & Switching

BGP Troubleshooting

Main Troubleshooting Flowchart Troubleshoot BGP Neighbor Establishment Troubleshoot Routes Missing from the Routing Table Troubleshoot Multihoming Inbound Troubleshoot BGP Route...
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Code

Python – IP Location and Subnet Scanner

This script was developed to address a specific scenario where vendors provide a range of IP subnets to be whitelisted....
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SecurityServers

F5 – Leveraging the X-Forwarded-For HTTP Header to Preserve Original Client IP Address in SNAT Traffic

When managing web servers, especially in situations where monitoring or logging is vital, accurately recording the original client IP address...
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SecurityServers

RFC 6761 – Special-Use Domain Names

The acronym “RFC” stands for Request for Comments. These documents are part of a series that describes how the Internet...
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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
  • IP Calculator
  • 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 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 Microsoft IIS Microsoft SQL Microsoft Windows Netflow OSPF Packet Capture Palo Alto Palo Alto CLI PDF Planning Ports PowerShell python QOS Splunk SSL Storage Structured Cabling TLS Troubleshooting Upgrade VMWare Zscaler
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