Kerry Cordero
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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
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... Read More
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... Read More
Servers

Types of HTTP Error and Status Codes

It’s important to know your HTTP error codes even if you’re a network engineer. You don’t need to memorize them... 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
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... Read More
Servers

VARs and Vendor Relationships – End of Life (EOL) Hardware in the Data Center – Hardware Life Cycle – Asset Management

Having a VAR and/or Vendor relationship is very important from a business perspective. Building that relationship is one of the... Read More
Laptops & DesktopsServers

Windows NTP

Another topic that seems to confuse people when it’s a simple process. I’ll blog soon about NTP in general when... Read More
Servers

Microsoft Windows Servers 10 Gigabit NIC Tuning

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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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Categories

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