Category: Network

VMware ESXi 6.7 – View the ARP Table

Recently, I needed to select the Internet Protocol (IP) addresses for various VMkernel adapters. In selecting IP addresses you must be certain that the IP address is not already in use to avoid an IP address conflict. One way to determine this is to ping the IP address in question. However, what do you do…


Integrated Dell Remote Access Controller 8 – Get IP Address

Have you ever connected to a remote server but didn’t know what it’s Integrated Dell Remote Access Controller 8 (iDRAC8) Internet Protocol (IP) address was? Well, you may use the following command to get the IP address of an iDRAC8. racadm getniccfg Additionally, more information may be found here.


Microsoft Windows PowerShell – Get DHCP IPv4 Scope Details

The Windows PowerShell cmdlet below will query a remote Dynamic Host Configuration Protocol (DHCP) server and provide the lease duration of each IPv4 scope. Get-DhcpServerv4Scope -ComputerName HOSTNAME | Select ScopeID, LeaseDuration


Microsoft Windows 10 – False Duplicate IP Address Detected

At my existing employer, it was brought to my attention that a number of VMware virtual machines running the Microsoft Windows 10 operating system were randomly dropping off the network, upon reboot. Viewing the properties of the network adapter confirmed that they were assigned static IP addresses. However, running ipconfig from the command prompt showed…


Domain Name System – Propagation

I recently decided to test a Domain Name System (DNS) provider expansion with GoDaddy andĀ  ClouDNS (link here) for a proof of concept using the domain name noelalvarez.org. The initial configuration and testing were successful. However, after I made the decision to host all DNS service with GoDaddy (again, it was a proof of concept)…


Microsoft Windows PowerShell – nslookup Configuration

You may use the following commands at a Microsoft Windows PowerShell to configure a default domain name system (DNS) server, for that instance, as well specify the type(s) of DNS records to resolve. This may be used for daily support of DNS. nslookup serverĀ <<<IP ADDRESS>>> set type=<<<DNS RECORD>>> domain.com For example, if you wanted to…


Red Hat Enterprise Linux 7 – BIND Installation and Configuration

Domain Name System (DNS) is an integral component of any Information Technology (IT) infrastructure. This is a step by step guide for configuring a Red Hat Enterprise Linux 7 public facing DNS server using the BIND software package. Additionally, I would like to add that, for the purposes of this demonstration the zone file created…