Kerry CorderoKISS IT Design Principle - Human Error Prevention
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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...
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CloudCodeData CenterLaptops & DesktopsLoad BalancingRouting & SwitchingSecurityServersVOIPWireless

Common Ports

Data CenterLaptops & DesktopsRouting & SwitchingSecurityServersWireless

SNMP Polling vs Traps

The difference between these is who is initiating the conversation. In Polling, the monitoring server is initiating the conversation asking...
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Laptops & Desktops

Eve-NG MacOS Error – Could not create a new process and open a pseudo-tty.

[Command not found: telnet] [Could not create a new process and open a pseudo-tty.] When I was using my Macbook...
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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 CenterLaptops & DesktopsRouting & SwitchingServers

DNS Rewrite aka DNS Doctoring

DNS rewrite or DNS Doctoring has been around on the Cisco ASA’s for a while. Palo Alto firewalls received this...
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Laptops & DesktopsServers

10 Common Reasons for a Windows AD Lockout

1. Programs with cached credentials 2. Changed password in a service account 3. Having a bad password limit that’s too...
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Data CenterLaptops & DesktopsSecurityServers

NTP Design Stratum Numbers

I already posted about NTP in a Windows domain. I want to briefly talk about stratum numbers. I’ve been in...
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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

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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  • 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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