Nfsen is an open-source Netflow collector and analyzer that displays statistics in a web interface in the form of graphs.Continue reading “Installing and using Nfsen”
Nfdump is a collection of tools for collecting and processing netflow data.Continue reading “Installing and using Nfdump”
On Ubuntu/Debian, VirtualBox is installed with the following command:Continue reading “Installing VirtualBox on Ubuntu”
Below I will describe how pptpd is installed and configured. On the test I will install in Ubuntu Server 18.04.Continue reading “Installing and configuring PPTPd server”
Let me give you an example of setting call forwarding in Asterisk.
For example, on Grandstream IP phones, you can enable redirection by the functions of the phone itself, but if the phone is far away and there is no way to do it on it, but it is possible to log in using the SIP number of this phone, then to activate call forwarding, you can make a voice menu when dialing a certain number, for example, *21 to activate call forwarding and enter the phone number to which calls will be forwarded, and *22 to cancel call forwarding.
On the test, I will install the fprobe sensor, which will collect statistics from network interfaces and transmit it to the collector.Continue reading “Installing and configuring fprobe”
Once on the same server running cPanel, CSF (Config Server Firewall) and LFD (Login Failure Daemon) I wanted to run the Speedtest CLI, but it did not start because it could not connect to the servers, I opened the CSF settings through the WHM panel (at the very bottom menu “ConfigServer Security & Firewall” – “Firewall Configuration”), where he discovered that only a few outgoing ports were open:Continue reading “How to allow all outgoing ports in CSF”
In this article, I will give an example of installing and running the Speedtest CLI.Continue reading “Installing and using Speedtest CLI”
Once, when running the Speedtest CLI on one Linux server, I noticed the following error:Continue reading “Solution for Speedtest CLI error “Failed to find a working test server””
Once, one Internet provider asked me that ABillS should not charge the subscription on New Year’s Eve, so that users who forgot to replenish their account do not disconnect at midnight.Continue reading “ABillS. How to run periodic on January 2”