Most of the home networks nowadays use mainly Wi-Fi, and we rarely get to see the wired connection directly to the machine. By default, when you connect to both the Wi-Fi and the ethernet cable, the windows machine would priorities the ethernet connection over the wifi.If you check the routing table, you should be able to see two default routes, … Read More
How To Setup NTP Server In Linux? (Centos, Rhel, Ubuntu)
If you have a Linux machine (Ubuntu, Centos, Redhat) running in your environment and you would want to configure them as an NTP server it is pretty easy. In our last blog, we took a look at what is NTP and how to configure the public and private NTP servers using network routers. In this blog, we are going to … Read More
How To Install PfSense on VirtualBox?
In some of my last blog posts, we covered the installation of pfSense on BareMetal meaning on old physical PC, and different hypervisors such as pfSense on KVM, VMware workstation, and so on. In this blog, we are going to cover how you can install pfSense on a virtual box hypervisor. Since VirtualBox is free and it supports Windows and … Read More
How To Install Palo alto In VMware Workstation?
As you know if you wanted to get hands-on and practice the Palo alto firewalls, the best place is to virtualize them. As many of you out there may not have the options to set up a physical lab. However, there are alternate ways to spin up the Palo alto lab in the cloud using AWS, but that again will … Read More
How To Install PfSense On VMware Workstation?
I have been running pfSense as my home firewall for quite some time now, setting up for the first time would be the difficult part for many. But once you make it up and running, it works just great. Since it is open-source there is no cost associated with it, and you can build a zero-dollar firewall setup by using … Read More
What is SNMP and how it works?
In a big network environment where you have hundreds or even thousands of devices connected, anything can go wrong at any point in time. So as a network or system engineer it’s your responsibility to make sure that all the systems are up and working at all times. In case anything goes wrong you need to find out what is … Read More
How To Fix USB Ethernet Not Recognized By pfSense?
In our last blog, we took a look at how you can setup a pfSense on an old computer. The problem with that setup is, it had only single 100Mb NIC which means I had to split the interface into the VLANs. So I can have the WAN and LAN separately, it should work great if you have a 1Gig … Read More
How to Setup IPsec Tunnel between Paloalto and PFsense?
In a world where everything connected over the internet, it is quite common that we get to see many enterprise users connect the branch offices via the IPsec VPN. Moreover, the internet connection is getting cheaper and cheaper now as compared to the dedicated links. That is one of the reasons too the SD-WAN is becoming popular as well. Connecting … Read More
How To Configure Netplan Network? – Examples
Ever since Ubuntu changed it’s network configuration utility to netplan from the traditional configuration, many of them got so upset. Some of them are very annoyed to the point they even entirely removed the netplan and installed ifupdown back into the system. So is Ubuntu Netplan going to stay ?, if yes shouldn’t we learn how to configure them on … Read More
The DHCP DORA Process Explained – With Packet Capture.
How does DHCP work in the network? Before we answer that question, we need to understand the different ways of configuring the IP addresses.You could use either DHCP or static IP configuration. You might already know the configuration of IP address statically on a computer. It requires you to go to the network properties of the network hosts and manually … Read More
How To Setup A Simple IPsec Site To Site Tunnel In Pfsense?
If you wanted to connect two sites over the internet, the very popular method is to use the IPsec. By default, the IP alone doesn’t provide security, so we need to wrap the IP packet with IPsec to encrypt the traffic inside the IP. Once the IPsec connection is established between two sites, no one on the internet can decrypt … Read More
How does the Address Resolution Protocol ARP work?
If you are new to networking you must have heard the term called ARP protocol – address resolution protocol many times.You may be wondering or even confused. Well, what is the ARP protocol and how ARP works in the real world? Before we talk about how arp works we need to know something called a mac address first. What does … Read More
6 Easy Steps To Configure Pfsense Firewall In GNS3.
I have worked on multiple firewalls; however, the one firewall that stands out from the crowd is the Pfsense firewall. Let’s take a look at what makes the Pfsense different from other firewalls, and then we will also see how you can install a Pfsense firewall on GNS3 software and start building a basic LAB. Below is the lab topology … Read More
How To Set Static IP On Ubuntu? (GUI and CLI)
If you’re using Ubuntu Dekstop or server, and one day you decided to change the IP address of your ubuntu machine from automatic (DHCP) to static configuration. how do you achieve that? If you are using Ubuntu with GUI, it is pretty straightforward, but what if you don’t have GUI and the only option that you have is to configure … Read More
How I have setup my GNS3?| 10 Easy steps.
I have seen some of my friends and colleagues who are struggling to get their GNS3 up and running with no issues at all. Sometime they call me and say, Saif can you please take a look, it is not working! The problem with GNS3 is that after you get everything working and the next day when you come back … Read More
How To Install And Configure SNMP on Ubuntu?
If there is no SNMP protocol, monitoring the Network hosts would have been difficult tasks for the admins. SNMP is a protocol that helps you identify the host availability with many parameters such as network health, hardware resources such as CPU utilization, memory storage, etc. In this blog, let’s discuss how to configure SNMP on an Ubuntu server and specific … Read More
What Is VXLAN? The Difference Between Overlay And Underlay
When I first heard about VXLAN I asked my colleague, what is VXLAN? And his answer was it is the same as VLAN but with X in the middle :).It is such a protocol that is difficult to comprehend for many. Table of content: What is Vxlan used for? What is the difference between VLAN and VXLAN? What is a … Read More
How To Install Checkpoint Firewall In Gns3?
You wanted to work with firewall, mainly the checkpoint firewalls, but you don’t know where to begin with and no prior experience with firewalls either, then you are in the right place. Even if you have experience with the firewall but just wanted to spin up the lab in GNS3, that’s fine too. In this blog, I will cover how … Read More
Palo Alto Firewall Lab Setup-Allow Inside Users To The Internet
When I started my Paloalto firewall journey, it wasn’t easy. I am from a network routing and switching background, and initially, when I had a chance to work with Palo alto firewall, I was a little hesitant. Eventually, I set up the Palo alto firewall lab and started to practice. Slowly I began to get the hang of it. After … Read More
5 Easy Steps To Configure SNMP on Redhat Linux or CentOS
The other day I was working on adding some of the Redhat servers in to production for monitoring. I also got the SNMP community string from the team who is managing the monitoring tools as well. I was so confident that I even informed them that I would configure the SNMP on the server in another 5 mins :). Do … Read More
How To Connect Your VM To The VPN?
In some of my last blogs, I wrote about how you can install Virtual machines on different hypervisors such as KVM, VMware, VirtualBox, etc. I use the windows machine as a daily driver Virtual Machine on my Ubuntu box; having the choice of both operating systems at a time is excellent. And I can switch between them any time I … Read More
How to create Bridge and Vlan’s in Linux – Nuage SD-WAN lab Part – 2
What is the underlay and Overlay network? When it comes to Nuage-SDWAN there are two types of networks that we have to use. First one is called the underlay network and the second one is called the overlay network. The underlay network is nothing but our traditional network which would help us to connect all the network equipment. Once the … Read More
Setup Hpe comware or MSR in gns3 and Telnet to Putty.
Most of the network engineers whom I know have worked with mainly Cisco gears and not Hpe Comeware devices, Including myself 🙂 And my transition wouldnt been easier if there was no GNS3. To get familiar with the Comware devices, what I have done is.. I have downloaded and installed Hpe VSR to my gns3. After that it was just … Read More
First Hop Redundancy Protocol – HSRP, GLBP and VRRP
Let me start off by showing some real life scenarios here, and then we would understand where do we use HSRP, GLBP and VRRP and its differences then we would fix the network. Instead of showing some labs right away. So let’s begin. We have Customer A , they are using a simple network topology as below. A router that … Read More
Configure Cisco Router As DNS Servers In GNS3 – Step By Step
There are many ways you could configure a DNS server. If you are a network engineer and wanted to build a private DNS server for a small office, you would rather set up a router as a DNS server than configuring a Linux or a Windows machine for the same purpose, right ? In this lab, we are going to … Read More
9 Reasons why you should use a VPN
Countries around the world are going above and beyond to protect their citizens from internet threats. One example is that in some countries, which has made it impossible for its citizens to access social media sites. And in some of the western countries, they are using the internet to invade its citizens’ privacy, it only makes sense to protect yourself … Read More
What is an ASN in BGP?- All you need to know about AS numbers
We all have configured Routing protocols and heard about the term ASN/AS numbers (Autonomous system number). However, when it comes to BGP, have you ever wondered what ASN really is and how you can get one?In this blog, let’s answer what ASN is in the BGP routing protocol, and it’s differences and types. A BGP public ASN or AS number … Read More
What is NTP? Configure Routers as the NTP server
What do you think is the best way for Network hosts to update its clock automatically?The answer to that is to use an NTP server, in this article lets find out what is NTP and its stratum values, and we would also configure Cisco and Comware routers as the NTP public and private servers. Why is NTP important? An NTP … Read More
Best Way To Stream VLC videos On Your Network
The VLC media player is great if you wanted to watch videos on your computer, tablet, or even on your smartphone. And the best part about this media software is that it not only play videos locally it also helps you stream videos over the network, meaning you can make your local machine as a video server and stream the … Read More
Step by Step to Configure Cisco Router as DHCP server in GNS3
I know how does DHCP works, but what if I want to configure my router as a DHCP server as well, is it possible? the answer is YES!, You can configure the Cisco router as the DCHP server and this blog we are going to cover the same. In the last blog, I covered how we can configure the Cisco … Read More
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