Kerry CorderoKISS IT Design Principle - Human Error Prevention
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CTRL+ALT+DEL in a RDP Session

If for some reason you need a user that’s RDP’ed into a Server or Workstation to do a CTRL+ALT+DEL, here...
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Laptops & DesktopsServers

AD Replication Internally vs Site-to-Site

I’m focusing more on DNS updates. Below is how long a DNS record will update (new record or updated record)....
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Laptops & DesktopsSecurity

Kali VMWare Error – Guest operating system ‘debian 10-64’ is not supported

If you’re getting this error: Below is the fix: While your VM is off, you need to go into your...
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Laptops & Desktops

Windows Wireless Profile Commands

There may be times where you need to add/remove wireless profiles from the CLI....
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Laptops & Desktops

Troubleshooting FTP Passive Mode Issues: PRODFTP vs. DEVFTP

When working with FTP in passive mode, issues can disrupt data transfer. In this case, we analyzed why the FTP...
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Laptops & DesktopsServers

Data Flow – DNS Resolution with AD and F5 BIG-IP DNS

1. Local Cache Check: You attempt to access a website (say, `app.lb.cordero.me`) on your Windows AD-managed laptop. Your operating system...
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CloudData CenterLaptops & DesktopsLoad BalancingRouting & SwitchingSecurityServersWireless

Certificates Self Signed vs 3rd Party

Here’s an explanation of the importance of self-signed certificates and third-party certificates in the context of certificate chains: Self-Signed Certificates:...
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CloudCodeData CenterLaptops & DesktopsLoad BalancingRouting & SwitchingSecurityServersVOIPWireless

Organizational Structures for IT – Network Leads & Network Architects

I’ve carried the Architect title over the years of being in IT. Below is my opinion on the difference between...
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Laptops & DesktopsServers

DNS Root (Apex) Domain vs Subdomain

In the context of DNS and websites, “cisco.com” and “www.cisco.com” are both domain names, but they have slightly different uses....
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Laptops & DesktopsServers

Windows DNS Server Behavior – Order of Operations:

In a Windows DNS server environment , if forwarders are configured, they take precedence over root hints for resolving external...
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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 F5-LTM 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 Structured Cabling TLS Troubleshooting Upgrade VMWare
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