Security – IT Blog

Nginx. Directory Access Restriction

In this article I will give examples of restricting access to files or directories by IP address or username and password.

Process monitoring through strace

I will give an example of running the strace utility, which allows you to track what a process or command is doing at a given moment.

Installing and using Tshark & Wireshark

Wireshark (formerly Ethereal) is a traffic analyzer program for computer networks. Tshark is the console version, wireshark is the GUI version.

How to hide email on a site from spammers

The first way through JavaScript:

Installing and using Ettercap

Ettercap is a tool for analyzing computer network security.

Configuring ClamAV + Postfix

I will give an example of installing and configuring the free ClamAV antivirus for checking email messages for viruses.

Configuring Spamassassin + Postfix

I’ll give an example of installing and configuring Spamassassin to filter spam.

How to disable TLS 1.0 and TLS 1.1 in Nginx

The TLS 1.0 protocol appeared in 1999, TLS 1.1 in 2006, and they will both be considered obsolete in 2020, and will also have to be removed from support in various browsers around March 2020, so you need to disable them. Similarly, SSL 2.0, SSL 3.0 protocols were previously outdated.

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

Installing and configuring fprobe

On the test, I will install the fprobe sensor, which will collect statistics from network interfaces and transmit it to the collector.