Tag: computer network

How to use OpenVPN with TCP protocol

By default, OpenVPN uses UDP and it is officially recommended to use it. However, TCP also works great with OpenVPN and you can use it if needed. Theoretically, the TCP protocol has more “overhead”, that is, some part of the transmitted data will not carry the payload, but is only necessary for the normal operation of TCP, which monitors the...

How to change configuration files when migrating from OpenVPN 2.4.* to OpenVPN 2.5.*

As of fall 2021, OpenVPN has moved to the new major branch 2.5.* for almost a year. If you were slow to update, now the new branch can be considered time-tested. However, if you are upgrading from the 2.4 branch, you may need to adjust the configuration files. 1. In the server and client configuration files, replace the line cipher...

LibreOffice opens sftp connection (SOLVED)

sftp is a utility from the OpenSSH package that combines the functions of FTP and SSH, that is, it provides convenient access to the remote file system, allowing you to edit, copy, delete files on the server in a graphical interface. In this case, the connection and data exchange takes place over a secure, encrypted channel. After connecting via sftp,...

How to use lsof to view open files (on Linux everything is files)

If everything in Linux is a file, then there must be more to this operating system than just files on your hard drive. In this tutorial, you will learn how to use lsof to view all other devices and processes that are being treated as files. Everything in Linux is files The oft-quoted phrase that everything in Linux is a...

How to configure the network interface to use a dynamic IP address (DHCP) in PowerShell

Note: all settings in this article must be done with administrator rights. Dynamic Host Configuration Protocol (DHCP) allows the network adapter to obtain the correct network settings without manually configuring network interfaces. To manage a network interface, you need to know its index. The list of interfaces and their indices can be obtained with the following command: Get-NetIPAddress | Format-Table...

How to set IP address, netmask, default gateway and DNS for a network interface in PowerShell

Setting a static IP, netmask and gateway for a network adapter in PowerShell is a little confusing but possible. This post will show you how to do this using the New-NetIPAddress and Set-NetIPAddress cmdlets. The old way of configuring network interfaces is using the netsh command. First, we look at the name of the network interfaces of any of the...

How to configure HTTP Digest Authentication in Squid

Basic authentication is bad because the password is actually transmitted in plain text (encoded in Base64). See the article “How to hack HTTP Basic and Digest Authentication” for details. Therefore, it is preferable to use Digest authentication on the Squid proxy server. Let's start by creating a file with a password hash, this is done with a command like: sudo...

How connect to the Tor network via bridge on Linux

Some ISPs are blocking Tor. They can use various approaches, for example, block connections to all IPs of the Tor network, or by analyzing traffic and, if it is identified as belonging to the Tor network, block it. Repeaters can be used to bypass this blockage. The bridge is one of the types of repeaters. Since not all bridge IP...

How to Configure Tor to Work Through a Bridge Relay and Proxy in Windows

If you want to install Tor as a service on Windows, then you need the Expert Bundle. It can be downloaded from this page of the official website. From the downloaded archive (in my case, the file is called tor-win32-0.4.5.8.zip), unpack the Tor folder to the root of the C drive. Configuring Tor to Work Through a Bridge Relay Theory:...

How to check if my router supports IPv6

How to open a site on IPv6 The fastest and easiest way to find out if a router can work with IPv6 is to check if it can open a site with an IPv6 address. Use the service “Do I have IPv6”. This website allows you to connect to it in a variety of ways – just follow the link...
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