FreePBX install on CentOS 7

FreePBX could be installed with pre-built distribution from Sangoma corp., which could be downloaded and installed pretty easy and quickly. But what if you already have installed server or you can’t use 3d-party distribution to install the server. FreePBX site has nice instructions on how to install Asterisk and FreePBX on existing server based on […]

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Zabbix graph of LXC container memory usage

Recently I implemented Zabbix monitoring system on Linux servers, some of which are physical machines, and some are LXC containers under those physical machines. In order to get accurate data on the CPU and RAM of the container, I used the wonderful Zabbix template for LXC/LXD containers (here the template: https://github.com/scanterog/zabbix-lxd). I used this template […]

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SPF for web-server

Sender Policy Framework is an extension for email sending  with SMTP protocol. It was created as a means of struggling with spam. It’s function is to indicate whether the sender of an email from a certain domain is authorized for such sending. If you use email hosting or even free mail services, then you most […]

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