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DNS

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Python – Find if a DNS Record Exists both Internally and Externally

# Author: Kerry Cordero # Version: 1.0.0 # Description: This script will scan both Internal and External DNS import dns.resolver...
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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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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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Security

SPF Records

SPF’s are used to help mitigate SPAM emails.  It basically dictates what happens when there’s a failure in a match...
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Servers

Root (Apex) Domain to Subdomain Redirects

When managing DNS records and configuring redirects, it’s important to consider the best location for these operations based on your...
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Load BalancingServers

HTTP(s) Redirects and DNS Redirects?

HTTP and DNS are protocols serving different purposes, and redirection via these two methods is fundamentally different. DNS Redirection: DNS...
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Servers

DNS – Domain Ownership in Microsoft Active Directory (Don’t use .local or UnOwned Domains)

Using a domain name within Microsoft Active Directory (AD) is pivotal, not just for routing and architectural considerations. Still, it...
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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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Servers

Understanding DNS: Why CNAME and MX Records Can’t Coexist for the Same Domain

DNS (Domain Name System) plays an indispensable role in web hosting and domain management. DNS is like a phonebook for...
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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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  • 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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