https://youtu.be/MEp5uvuoWGQ Labs are great for testing, development and demo. In this tutorial I am going to show you how I setup my lab in 2025. Basic Setup and Configure the Ubuntu Hosted Server (SSH should have been enabled) Key steps Update the Ubuntu Server with...
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Ubuntu 22.04 – Check memory usage – free | top
https://youtube.com/shorts/x6N1uD1CSd0?feature=share In Ubuntu (and Linux in general), "free" refers to the amount of unused RAM (Random Access Memory) available on your system, which you can check using the "free" command in the terminal; essentially, it...
Ubuntu 22.04 – Check disk usage – df | du
https://youtube.com/shorts/3KlDF59ABuM?feature=share In Ubuntu, "df" stands for "disk free" and is a command used to display the amount of available disk space on a mounted file system, essentially showing how much free space is currently available on your system. df...
Ubuntu 22.04 – Check how long the system has been running – uptime
https://youtube.com/shorts/SgxCEBW2vhw?feature=share Use the following command to check how long the system has been running uptime
Ubuntu 22.04 – What is Bash and its config
Bash (Bourne Again SHell) is one of the most commonly used command-line interpreters or shells in Unix-based systems, such as Linux and macOS. It provides an interface for users to interact with the operating system by executing commands, running scripts, and managing...
Ubuntu 22.04 – Add User to Sudoers and Config
Use the usermod or adduser command to add user to sudoers group sudo usermod -aG sudo username or sudo adduser username sudo To remove the need to enter password when issuing sudo (privilege) commands. The file that the configure is saved /etc/sudoers. Use the visudo...
Ubuntu 22.04 – Change hostname – hostnamectl
https://youtube.com/shorts/6gWG9n2Hq8I Command to change Ubuntu hostname through CLI without rebooting hostnamectl set-hostname new-hostname There are other useful options that you can use with hostamectl command If you are a developer than showing the host...
Ubuntu 22.04 – Check Ubuntu current version – lsb_release
https://youtube.com/shorts/OV-0sWpzxJk?feature=share Here are the methods and commands to check ubuntu version 1. Using the lsb_release -a command2. Checking the file /etc/lsb-release or /etc/os-release3. Checking the file /etc/issue4. Using the hostnamctl command 1....
Deploy FMCv 7.4.1 in KVM – Ubuntu 22.04
The Secure Firewall Management Center Virtual (formerly Firepower Management Center Virtual) Appliance brings full firewall functionality to virtualized environments to secure data center traffic and multi-tenant environments. The management center...
How to create a systemd timer to update ip address in ipset from Dynamic DNS
Systemd timers are a feature of the systemd init system on Linux. They are used to schedule and automate the execution of tasks or services at specific times or intervals. Timers are often used for automating periodic maintenance tasks, backups, data synchronization,...
How to create a cron job to update ipset with ip address from Dynamic Domain
Creating a cron job for IPset involves scheduling a task that updates IPset with a list of IP addresses at specified intervals. In this tutorial I will show you how to update a Update the syntax in bold and italic with your own. Here's a step-by-step guide on how to...
How to configure ipset – Ubuntu 22.04
ipset is a utility in Linux used for managing sets of IP addresses, ports, or other IP-related objects. It is a powerful tool that can be used to create and manage lists of IP addresses and related data efficiently. ipset is particularly useful for implementing...
Cron Job
A cron job is a scheduled task or automated job that runs at specified intervals on Unix-like operating systems. The name "cron" comes from the Greek word "chronos," meaning time, and it is a time-based job scheduler in Unix and Unix-like operating systems. Cron jobs...
Onboard FTDv 7.2.3 (FDM) to Cisco Defense Orchestrator (CDO)
Cisco Defense Orchestrator (CDO)/Cloud Firewall Management Center (FMC) is Cisco Cloud Management Solution for Firewalls. It provide the convenience and ease of use for managing multiple firewall from a single management console. It reduces the complexity and time to...
Configure Site to Site VPN between FTDv 7.3.0 (Using FDM) Running on KVM (Ubuntu 22.04)
Virtual Private Network (VPN) is a network connection that establishes a secure tunnel between remote peers using public ip address to connect 2 or more private networks. Encryption is use to ensure privacy and integrity of the Data. IPsec-based VPN technologies use...
Configure Remote Access (RA) VPN on FTDv 7.3.0 Managed by FDM
Remote Access Virtual Private Network (RA VPN) allows remote office / remote worker to connect back to the Head Office to gain access to resources that are not accessible from the public internet directly. Even thou more and more application are accessible from the...
Cisco FTDv 7.3.0 – Using FDM to configure HA (KVM in Ubuntu)
High Availability (HA) is a Active-Passive (Standby) setup that provide high availability for the LAN users. It is a useful setup for customer who wants to ensure that if one device fails the other device will take over while waiting for the faulty unit to be...
Cisco FTDv 7.3.0 – Configure FTDv using FDM Custom Port forwarding to SSH Client behind FTDv
In this setup I will show you how to configure FTDv using FDM to map custom SSH port 11122 to port 22, to gain access to a SSH Client behind the FTDv firewall. Below is how the setup looks like. 1. Go to Policies and select NAT and then click on ADD button. 2. In this...
Cisco FTDv 7.3 Configure Port Forwarding using FDM (RDP to the Windows 10 Client behind the Firewall)
In this tutorial I will show you how to port forward RDP to the Windows Client behind the firewall. Below is how the setup looks like. For those that are looking at using FMC / Cloud FMC to configure the port forwarding rule, the configuration is slightly different....
Configure FTDv using FMD to Allow Management from Internet (Through Outside Interface) or NAT to Management Interface
https://youtu.be/-bS8-iwhyMc Below is a graphical Diagram on how the setup looks like. To configure the FTD/FTDv to allow management from Internet/Outside interface below are the step by step guide. Configuring Cisco FTD using FDM (Firepower Device Manager) for...
Configure FTDv using FMD to Allow Management from Internet to the outside interface
Below is the Interface assignment and IP Addresses of the setup. At the end of this setup we will allow the Windows 10 Client (UMB SIG IP) to Managed the FTDv using FDM from the outside interface for the FTD. 1. Login to the FDM from the inside Windows 10 Client...
Configure ASAv Inside and Outside Interface with Dynamic PAT for internet Access
ASAv Version: 9.16 In this tutorial I will show you how to configure the ASAv Inside and Outside Interface. To allow access to the internet from a workstation in the LAN. We will be using the GigabitEthernet0/0 interface (GE0/0) as the outside interface for connection...
Install Windows 11 on KVM (Ubuntu 22.04) with software TPM 2.0
To install Windows 11 on KVM you want to make sure that you have swtmp install and in your KVM environment. Like its name suggest is a software that emulates TPM 2.0 in your virtual environment. You can do a quick check by running the following command. swtpm...
Deploy FTDv Cisco Secure Firewall Threat Defense Virtual in KVM (Ubuntu)
https://youtu.be/nZ_noM6fbME In this tutorial I am going to show you how to deploy FTDv in KVM. The minimum system requirements for deploying FTDv are 4vCPU and 8GB RAM (Default). You will need to have at least 4 interfaces to successfully boot up. Create a shell...
How to create a SYSTEMD service for VNCServer to AutoStart at Reboot
Systemd is a system and service manager for Linux operating systems. It is used to manage and control services, manage system startup and shutdown, and perform various system-related tasks. Here is the sample configure for the systemd service....