IT DeepDive Articles on IT DeepDive

Install and Configure GNS3 with VirtualBox on macOS Catalina

Sat, 13 Feb 2021 00:00:00 +0000

In this article, I'll show you how to install and configure GNS3 on a Mac Catalina. We will focus on these specific version, GAs at the time of writing but hopefully the same instructions might be applicable for slightly different versions:

GNS3 version 2.2.18
macOS Catalina 10.15.7

Step 1 - Download GNS3 and GNS3 VM

Head over to GNS3 software page and download macOS version 2.2.18. If you don't have an account, you will have to create one! For optimal performance, also download the GNS3 VM. In this article I will be using VirtualBox, so fell free to download and install it as well if you'd like to follow along.

NSX-T Packet Capture: East - West Traffic on Overlay Segment

Mon, 30 Nov 2020 00:00:00 +0000

In this article, we are going to perform packet captures at different capture points between 2 VMs running on 2 Overlay segments attached to a T1 Router.

Topology

The Tier-1 Gateway does not provide stateful services so it's not connected to an Edge Cluster. It worth mentioning it because the data path will only go from ESXi host to ESXi host without the need of traversing the physical network.

Kubernetes Multi-Node Cluster on Raspberry Pi 4

Mon, 26 Oct 2020 00:00:00 +0000

In this article we'll setup a 3 nodes Kubernetes Cluster running on 3 Raspberry Pi 4B boards.

I chose the 4 GB model even though, according to Kubernetes Docs, 2 GB or RAM should be enough.

If You are interested in building your own Cluster, here is the list of components I used:

Step 1 - Creating the MicroSD

From https://www.raspberrypi.org/software/ download Raspberry Pi Imager

Kubernetes Multi-Node Cluster with Multipass

Mon, 12 Oct 2020 00:00:00 +0000

In this short article I will explain how to create a 3 nodes Kubernetes cluster on your Mac leveraging Multipass.

"Multipass provides a command line interface to launch, manage and generally fiddle about with instances of Linux. The downloading of a minty-fresh image takes a matter of seconds, and within minutes a VM can be up and running."
The Register

Deploying the 3 Kubernetes nodes via Multipass

Let's list what images are available to deploy:

ownCloud Tutorial Part 4: Configure Desktop and Mobile Clients

Mon, 20 Jul 2020 00:00:00 +0000

Connect to the Owncloud server using a desktop or mobile client

Users can access and synchronize their personal data stored within the ownCloud server via desktop clients and mobile apps.

Dektop clients

Desktop clients are available for Mac Os, Windows and Linux

Once you installed the client, you will be presented with the onwCloud Connection Wizard. Enter your server details and click Next:
Now type your Username and Password and press Next:
Customize your settings and click Connect...:
As soon as the first synchronization task completes, you can close the active window.

ownCloud Tutorial Part 3: Adding new Users

Sun, 19 Jul 2020 00:00:00 +0000

Adding Users

Login to the web interface with your Admin credentials;
On the top right corner, select admin and chose Users:

Users
Add the user's details:

Add users
Once created, from this pane you can set a temporary password for the user and change its full name or leave it for him/her to complete:

Change users details

ownCloud Tutorial Part 2: Configure custom URL and HTTP port

Sat, 18 Jul 2020 00:00:00 +0000

Configure a custom url and http port

In this chapter we'll discuss how to configure Apache web server to redirect the homepage from http://owncloud_ip/owncloud/ to http://owncloud_ip:custom_port.
In this example we are going to be using the IP address 192.168.0.105 and tcp port 8080 (http://192.168.0.105:8080).

Configure httpd to listen on port 8080

Backup the current /etc/httpd/conf/httpd.conf and change Listen 80 to Listen 192.168.0.105:8080.

1cd /etc/httpd/conf/ && cp -p httpd.conf httpd.conf.bck && sed -i 's/^Listen 80$/Listen 192.168.0.105:8080/' httpd.conf

Save and close the file.

ownCloud Tutorial Part 1: Install & configure the ownCloud Server

Fri, 17 Jul 2020 00:00:00 +0000

This quickstart guide is for those who want to quickly install and configure a ownCloud Server. Although there are many different ways to achieve this goal, this document will cover a standard single-server ownCloud installation on CentOS 7.

Install and Configure ownCloud Server

ownCloud offers a variety of installation options:

In this document we will cover a standard single-server installation on CentOS 7.

Prerequisites

A fresh installation of CentOS 7 with SSH enabled.
This guide assumes that you are connected as the root user.

Prepare the Server

According to ownCloud documentation the supported environments for best performance, stability, support, and full functionality are:

Active Directory authentication on Centos 7

Wed, 13 May 2020 00:00:00 +0000

In this article we discuss how to integrate CentOS 7.x & RHEL 7.x with AD (Windows Server 2008 R2 & Windows Server 2012 R2).

The following steps are applicable either if you have CentOS 7 or RHEL 7.

Step 1 - Install the required packages using yum command

1yum install sssd realmd oddjob oddjob-mkhomedir adcli samba-common samba-common-tools krb5-workstation openldap-clients policycoreutils-python

Step 2 - Update the /etc/hosts file and /etc/resolv.conf so that the DNS name or hostname of the AD server gets resolved correctly.

Install and Configure GNS3 with VMware Workstation Player Free

Thu, 23 Apr 2020 00:00:00 +0000

In this article, I'll demonstrate how to install GNS3 on Windows 10 using VMware Workstation Player free to run the GNS3 VM.

Prerequisites

VMware Workstation Player (free): https://www.vmware.com/products/workstation-player/workstation-player-evaluation.html
VMware VIX 1.17.0 API for Windows 64-bit operating systems: https://www.dropbox.com/s/ffhqh17kaxjgk8k/VMware-VIX-1.17.0-6661328.exe?dl=0
GNS3: https://www.gns3.com/software/download
CISCO IOS Router image (c3725-adventerprisek9-mz.124-17.bin) : https://www.dropbox.com/sh/9owd781pm2akic8/AACR6W0GE8gHX-36JYl6fMa4a?dl=0

For VMware Workstation Pro, the VIX API is not needed, so if you either have the Pro version already installed, or plan to install the 30 days trial, or decide to buy the Pro version, you can skip VMware VIX API installation and "hack".

Install TFTP Server on Centos 6

Thu, 16 Apr 2020 00:00:00 +0000

Recently I had to troubleshoot a TFTP server that was part of a vSphere AutoDeploy environment. In the attempt to reproduce the issue in my lab, I deployed and configured a TFTP Server running on Centos 6. Here is what I did.

Step 1 - Update the server:

1yum update && yum upgrade -y

Step 2 - Install the following packages

1yum install -y tftp tftp-server tcpdump

[Optional] If the server is not connected to internet, mount the iso DVD and install from local source:

Log Insight: Migrate data from one node to another

Tue, 31 Mar 2020 00:00:00 +0000

There are some occasions when you may want to migrate the data between nodes inside a vRealize Log Insight Cluster. An example could be if one of the nodes in the cluster is broken for any reasons (bugs, application problems, accidental deletion of vital configuration files, file corruption, etc.)

Disclaimer: the following troubleshooting steps may cause data loss. Proceed at your own risk only you know what you are doing.