Author: Danilo

VM Replication with vSphere Replication and Site Recovery Manager shows a possible scenario for using vSphere Replication and Site Recovery Manager (SRM) to replicate and manage virtual machines. Our scenario is based on a lab topology, as shown in the following picture: The “Main Site” is the active site, where all production virtual machines are hosted. The “DR Site” is the passive site and receives VM replicas from the active site. There are many technologies and configurations on this topology, but we will focus on vSphere Replication (VR) and Site Recovery Manager (SRM). What is vSphere Replication (VR)? VMware vSphere…

IPsec VPN on VyOS demonstrates how to establish a secure tunnel between two sites over the Internet. I have written some articles about VyOS. If you want to check the articles, you can read them by accessing the following links: I have started working on a new network topology, simulating a company with a Main site and replicating some virtual machines to a disaster recovery (DR) site. It is a complex scenario that involves numerous technologies and configurations. We can see the topology in the following picture: The primary goal is to establish a secure communication channel between the sites, utilizing…

Setting Up a DHCP Relay on VyOS shows how to configure a DHCP Relay on the VyOS router. We have written some articles about VyOS, and we’d like to share them if you: How to Install VyOS Router in a Lab Environment:https://dpcvirtualtips.com/how-to-install-vyos-router-in-a-lab-environment/ Performing Basic Configurations on the VyOS:https://dpcvirtualtips.com/performing-basic-configurations-on-the-vyos/ First and foremost: What is DHCP Relay? A DHCP Relay is a network service that forwards DHCP requests from clients on one network to a DHCP server on another network (different broadcast domains). Since DHCP uses broadcast messages that don’t cross routers, a DHCP relay listens for these broadcasts and relays them…

Changing DNS Settings on ESXi Hosts is an article that shows an automated approach to changing the DNS configurations on all connected ESXi hosts under the same vCenter Server, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script from this server to connect to each ESXi host and upgrade the VMware Tools. 1- Install CentOS 9 (without GUI) – We have tested it with CentOS 9, but feel free to install a different Linux flavor and adjust the script to run on it. 2- Access it by SSH with root…

Changing NTP Settings on ESXi Hosts is an article that shows an automated approach to changing the NTP client configurations on all connected ESXi hosts under the same vCenter Server, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script from this server to connect to each ESXi host and upgrade the VMware Tools. So, let’s get started: 1- Install CentOS 9 (without GUI) – We have tested it with CentOS 9, but feel free to install a different Linux flavor and adjust the script to run on it. 2-…

Upgrading VMware Tools on ESXi hosts is an article that shows an automated approach to upgrading the VMware Tools version on an ESXi host, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script from this server to connect to each ESXi host and upgrade the VMware Tools. Upgrade VMware Tools on Standalone or Manually Specified Hosts If you want to upgrade the VMware Tools version on Standalone hosts or want to specify the hosts to be upgraded manually, let’s get started: 1- Install CentOS 9 (without GUI)…