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.
Laptops & DesktopsServers

Windows NTP – NT5DS and FSMO

Another good topic to talk about. I’ll blog soon about NTP in general when it comes to stratums and a...
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Data CenterRouting & Switching

Cisco – Min and Max Fiber Signals dBm

You’ll want to know what a good Fiber dBm is when troubleshooting networks. Always look at the Data Sheets. I’ve...
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Routing & Switching

Does this count?

Well….I passed the CCIE Routing & Switching Lab just not on the same day. I still feel good I was...
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Routing & Switching

NMAP – Traceroute with Geolocation

nmap --traceroute --script traceroute-geolocation {DOMAIN} NOTE: You need to run this with elevated privileges. ❯ sudo nmap --traceroute --script traceroute-geolocation...
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Security

Cisco ACS to ISE High Level Design Questionnaire

This post is a high-level design questionnaire that can be used to gather information from a customer’s environment to plan...
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Security

Okta MFA O365 Email – Do Not Use Basic Auth

Basic Auth – requires only username/password and not compatible with 2-step authentication  (LEGACY – Bypasses MFA requirements)...
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Laptops & Desktops

MacOS oh-my-zsh errors fix

After an upgrade to my oh-my-zsh software, I was getting a bunch of errors like the ones below: [oh-my-zsh] Insecure...
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Data CenterRouting & Switching

Cisco BGP AWS Direct Configuration with Community

Below I’m going to go over a simple BGP configuration that’s used with AWS Direct. You need to get the...
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Security

NMAP – Enumerating SSL

SSL CERT: To retrieve a server’s SSL certificate: nmap –script ssl-cert -p 443 {DOMAIN} ➜ ~ nmap --script ssl-cert -p...
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Data CenterRouting & Switching

Cisco NX-OS/IOS Configuration Basics Comparison

Cisco NXOS and IOS are two different operating systems used on different Cisco devices. NXOS is used on Cisco’s Nexus...
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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

  • 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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