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15 April
Posted in Linux, Security

What are major security issues related to TrueCrypt?

There are two major types of attack to TrueCrypt’s volumes. 1) Keylogger (software or hardware) – it’s obvious, and this isn’t a TrueCrypt problem. Hence I won’t write about this. Just – be careful if you mount a TC volume on unknown or foreign machines. You should suppose that each […]

22 September
Posted in Bash, Projects, Security

Basics of writing bash scripts, a simple antivirus on a linux router

If you are a network admin then malware can be your main . Typical user in your network uses Windows and he has this problem now or he will have in the future. You musn’t learn your users how to use computers, but you can better supervise them. ;-) In […]

15 August

WordPress on nginx – how to secure the admin panel

Many people know that the admin panel in the wordpress is located in wp-admin/ dir so we can open it trying an adress domain-of-wordpress-blog/wp-admin. This is no comfortable situation because spambots know it as well. Of course, the first step to improve your security should be a secure password – […]

15 July
Posted in Bash, Linux, Security

How to automatically encrypt backup files

In the most serious companies, backup is a really important thing, one of the most important probably. But sometimes more important is a question about security of this saved data. Usually backup is comprehensive of data from many systems and it’s stored in a special device (NAS). This data is […]

21 June

How to completely hide your network traffic

In this article I explained what may see your Internet Service Provider. Now, I will write some information about how to protect your network traffic.  My solution is based on a bash script on a client and a server. The script works on the client computer, connects to the server […]

13 June
Posted in Bash, Linux, Security

Basics of writing bash scripts, autoblocking ssh break in attempts

This script is a typical problem of the reinvention wheel, because there are many programs, which may prevent from robots which are try to guess the passwords in the ssh service. If you don’t trust your security skills, you should use them or read this text. I will try to […]

21 May

Secure configuration of OpenSSH

OpenSSH is a service designed for a remote management so secure configuration of it is mandatory. I show some useful tricks to make your OpenSSH safer. I describe options from the main configuration file of the OpenSSH service – in most distributions it is at /etc/ssh/sshd_config   1) Turn off […]

2 May
Posted in Bash, Linux, Projects, Security

Remote technical support by VNC through SSH Tunnel

I suppose that you are an advanced linux user. And those skills make you really happy. But, sometimes we have a big problem: our friends may want to have Linux on their computers. There are many reasons why. Probably Linux looks like pretty for those people. The main point is: […]

22 April
Posted in Security

The cryptography and Truecrypt basics

In this post i will try to simply explain the amazing cryptographic world to people whose don’t understand it. If you are interesting the cryptography and the informations protection in computers technology but you aren’t able to understand many terms, this article is for you!   Cryptography for ordinary people The […]

20 April

What can see your Internet Service Provider?

Did you think ever what’s happen when you browsing the Internet?   Flow of information in a typical computer network is displayed on the image below: Let me introduce you about couple things. The field “Your computer” represents a computer, a smartfon, a notebook, a printer, a TV tuner – […]