Kerry Cordero
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DNS

Laptops & DesktopsSecurityServers

Finding Public IP Ranges using DIG

This is one way to find public IP Ranges for email using DIG. This is used if you want to... Read More
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... Read More
Servers

Public DNS Security

This is a good doc from Google. Security Benefits Introduction: DNS security threats and mitigations Because of the open, distributed... Read More
Data CenterLaptops & DesktopsSecurityServers

DNS Authoritative vs Non-Authoritative (Recursive) and DNS Flows

DNS name servers are usually split into two categories:... Read More
Laptops & DesktopsServers

DNS Basics

Let’s talk about a topic that some people just don’t get, DNS. I’ll try to make is super simple to... Read More

Categories

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  • Laptops & Desktops (46)
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  • Security (84)
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AWS Azure Best Practices BGP Cisco Cisco ACI Cisco ACS Cisco AnyConnect Cisco ASA Cisco ASR Cisco Catalyst Cisco CCIE Cisco CLI Cisco ISE Cisco Nexus Cisco Stack Cisco UCS Cisco VIRL DDOS Design DNS EIGRP F5 HP IP Sla Kali macOS MFA Microsoft Windows Netflow NMAP NTP Okta OSPF Packet Capture Palo Alto Ports powershell python QOS snmp Splunk Troubleshooting VMWare WLC
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  • Home
  • About
  • Disclaimer
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Categories

  • Cloud
  • Code
  • Data Center
  • Laptops & Desktops
  • Load Balancing
  • Routing & Switching
  • Security
  • Servers
  • Uncategorized
  • VOIP
  • Wireless

Tags

AWS Azure Best Practices BGP Cisco Cisco ACI Cisco ACS Cisco AnyConnect Cisco ASA Cisco ASR Cisco Catalyst Cisco CCIE Cisco CLI Cisco ISE Cisco Nexus Cisco Stack Cisco UCS Cisco VIRL DDOS Design DNS EIGRP F5 HP IP Sla Kali macOS MFA Microsoft Windows Netflow NMAP NTP Okta OSPF Packet Capture Palo Alto Ports powershell python QOS snmp Splunk Troubleshooting VMWare WLC
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Troubleshooting Palo Alto Microsoft Windows Cisco ASA Cisco CLI
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