You may need to adapt a video file to a different format or aspect ratio, for example remove the black parts on the sides of a vertical video saved originally with a 16:9 aspect ratio. Use Crop & Trim Video…
Applications seen in this post. fre.ac VLC Media Player Applications to extract audio from a video file. fre.ac Available for Windows. It can be installed directly from Microsoft Store. Add video to list. Select output file. Click on play icon…
There are two tools very useful for this: Automator MacroRecorder Automator This is very powerful, but quite difficult to use especially at the beginning. It is install by default on Mac. You can find this tutorial about how to…
This post summarizes some Virtual Private Network (VPN) services that are available for free. List of free VPN services List of free VPN services: Linux Fu VPN VPN Gate Tor HideMyAss hide.me Whoer.net Free Web Proxy SwitchVPN VyprVPN Linux Fu…
The Slowloris script opens two connections to the server, each without the final CRLF. After 10 seconds, second connection sends additional header. Both connections then wait for server timeout. If second connection gets a timeout 10 or more seconds after…
Self-signed certificates are widely used for testing purposes. In self-signed certificates, user creates a pair of public and private keys using a certificate creation tool and signs the document with the public key. The receiver requests the sender for the…
This post explains how can we identify the model of a wireless router using Linux. Step by step 1. Set your wireless adapter in monitor mode Check this post about how to put a wireless adapter in monitor mode in…
Wireless network interface controllers (WNIC’s) can operate in different modes: Managed mode: the only packets that are received in the computer are the one directed to it. Promiscuous mode: it is a listening mode that exists for both wired and…
First of all, you need to know your IP and the network range where it belongs to. It is important to perform scanning that you understand the meaning of IPv4 addresses. You can check this post explaining about it. Open…
This post explains briefly the network protocol IPv4 and summarizes the main aspects of it. IPv4 Characteristics IPv4 is based on best effort. It does not guarantee delivery. The datagrams are not delivered in order. It is resilient, and uses…