Kerry CorderoKISS IT Design Principle - Human Error Prevention
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Kerry Cordero
JoinedMay 2, 2023
Articles656
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.
Code

Python – Find IP Location with IPSTACK API (Geolocation)

# Author: Kerry Cordero # Version: 1.0.0 # Description: This script will find IP Location via ipstack API import requests...
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CodeServers

Powershell – Find All AD Integrated DNS Servers

    $dnsServers = (Resolve-DnsName -Name e-ins.net -Type NS).NameHost Resolve-DnsName -Name _ldap._tcp.dc._msdcs.e-ins.net -Type SRV | Where-Object {$_.NameTarget -in $dnsServers}  ...
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Code

Powershell – Find What AD Group a User is a Member Of

  Get-ADUser -Identity "kcordero" -Properties MemberOf | Select-Object -ExpandProperty MemberOf  ...
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CloudLoad Balancing

F5 – BIG-IP DNS Changing A Records with Zonerunner

When using F5 DNS (formerly known as BIG-IP DNS) and Zonerunner together, the best way to make changes to the...
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Routing & Switching

Architect – M&A IP Addresses and DNS

When undergoing a merger and acquisition (M&A) in the IT domain, IP address overlapping and DNS management require careful planning...
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CodeServers

Powershell – Find AD Computers Created within 7 Days

  $lastWeek = (Get-Date).AddDays(-7) Get-ADComputer -Filter { whenCreated -ge $lastWeek }  ...
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CodeServers

Powershell – Find FSMO Roles

To find the Flexible Single Master Operations (FSMO) roles in an Active Directory (AD) environment using PowerShell, you can use...
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Load Balancing

F5 – BIG-IP DNS Create Subdomains

To create subdomains using F5 BIG-IP DNS and Zonerunner, you can follow these steps: 1. Access F5 DNS Configuration Utility:...
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Routing & Switching

Architect – M&A IP Overlap and NAT (Avoid)

When undergoing a merger and acquisition (M&A) in the IT domain, it is generally advisable to avoid Network Address Translation...
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CloudSecurityServers

DNS for App Dev Prod and Non-Prod

When it comes to building out DNS Fully Qualified Domain Names (FQDNs) for application development, it’s important to consider the...
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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

  • 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 macOS Microsoft IIS Microsoft SQL Microsoft Windows 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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