IT Blog

Installing and using Nfsen

Nfsen is an open-source Netflow collector and analyzer that displays statistics in a web interface in the form of graphs.

Installing and using Nfdump

Nfdump is a collection of tools for collecting and processing netflow data.

H3C CLI

I will give examples of some commands for H3C switches.

Adding ONT ZTE F660 on Huawei SmartAX MA5683T

First of all, configure ONT. We will connect to it through any of the LAN ports, in the browser we will type the address 192.168.1.1 and enter the login and password.
The standard login is admin, the password is admin.
With elevated privileges, login is mgts, password is mtsoao.
The most basic thing is to create a WAN connection with the necessary parameters, in which we indicate the VLAN number, I will use 228.

Removing Ads from Browsers

You can block the display of ads from sites in almost all types of browsers by installing the Adblock Plus add-on

How to change the channel frequency in Arris modems

For example, I will use the Arris CM550B cable modem, in other models the change method is similar.

Installing VirtualBox on Ubuntu

On Ubuntu/Debian, VirtualBox is installed with the following command:

How to downgrade PHP

Using an example, I will downgrade PHP in Ubuntu 18.04, in which version 7.2 is installed by default. I do not recommend downgrading PHP, since newer versions are more productive and close vulnerabilities, but there are times when you need to run an old script or engine that does not work on newer versions of PHP, and it is very difficult to fix the code due to the fact that there are a lot of files.

Configuring PPTP (VPN) server on Mikrotik

First, I will describe the first simple option for setting up a PPTP (VPN) server on Mikrotik via the web interface or Winbox. In this embodiment, only one client can connect to the server.

Installing and configuring PPTPd server

Below I will describe how pptpd is installed and configured. On the test I will install in Ubuntu Server 18.04.