viktooor.com - Tech blog from Hungary

Nowadays every major website operates over HTTPS, aka have that little padlock next to the URL in our browsers. It means that we can establish a secure connection with the webserver, and all of the traffic is encrypted. In this port I’m going to describe…

With the help of NFS we can share a filesystem via the network. On the client side we can mount the NFS filesystem just like any other regular partition. In this brief post I’d like to outline the main steps how we can set up…

With the implementation of LVM we can reallocate storage space and extend our storage volumes really easily. In the example below I’d like to show how. Keep in mind that these examples are for learning purposes only, it doesn’t make a lot of sense in…

In a previous post I wrote about how can we accomplish NAT with Cisco devices. This time let’s examine how can we implement the same thing in Linux with the topology below. Basically we’re going to turn our Kali1 machine into a router which is…

After finishing the MPLS configuration in this post, I thought to take a closer look at the MPLS network, especially the labels: with the help of Wireshark we can examine how the labels are being inserted, switched and eventually removed at the edge routers. I…

In this post I’m going to describe succinctly how to configure your own VPN on a remote VPS with Wireguard. Of course you can host your own VPN server from home, if you’re not behind a NAT and have a public IP address, and you’ve…

I’ve been learning to configure MPLS and VRFs recently. I’m using GNS3 network emulator with real Cisco IOS images since other simulators such as Packet Tracer doesn’t support MPLS and VRF configuration. Running MPLS and having VRFs have many advantages: without using MPLS the customer…

I extended the single-area OSPF topology I configured previously in this post with two additional areas and I added an EIGRP network to the topology. In this post I’ll describe how to configure a multi-area network and how to redistribute different dynamic routing protocols on…

Recently I’ve made some Packet Tracer practices, I’m going to share the commands I’ve issued on Cisco routers, and describe the configuration of different type of source NATs. 1. Static Source NAT In this configurations we can translate one host’s private IP address (from the…

A few posts ago I showed how to measure power consumption with Shelly’s IoT device. In this post I’m going to share my measurement results regarding my PC and my Playstation 5. I measured the total power draw of these devices directly from the socket.