Author Archives: Arif Rahman

What is ftp and how to use vfstpd in Linux to transfer files

FTP- File Transfer Protocol is used to transfer files between one computer to another computer. With ftp service you can send file, get file from server computer to your computer. Suppose, you are a web developer, after developing your sites you have to upload your files to web server to make change your site. Here, ftp help you to upload files to server.

Using SpamAssassin to fight with SPAMs

Email Spam is known as Junk email, UBE (Unsolicited Bulk Email). If anyone send a identical mail to numerous recipient is simply called Spamming. Spamming is a great problem for all kinds of users, it kill system resource, time and money.

SpamAssassin is a open source free application to provide filtering for unwanted junk email (SPAM). Main theme is that, “filter your mail before it reach your inbox”. You can integrate SpamAssassin with mail server to filter spam email. It providse many useful features like DNS base spam detection, online database, external programs, blacklist etc. In this article we will show you, how you can use smamassassin to fight with email spam, various types of filtering methods, making database to prevent spam etc. so keep eyes on whole article.

How to recover root password in Linux

Its a common problem to forget password for any system. Even its also happens for root users, then we have to recover password for root. Root user is most power full user of Linux system. You can do anything with root access.  The fact is, you can change others user password with root access, but for root user either you have to know present password or you have to go for recovery mode.

For security reason all system admins have to know how this gonna work. because any one can do this with your system and take access your full system. So know it first and then secure your system. In this article i will show you some recovering methods for root password.

Five best free Antivirus for Linux

Antivirus for Linux? Are you kidding with me? Isn’t Linux secure from viruses? many new users of Linux are thinking those questions right..! I am telling you don’t be hesitate to see this title. Keep eye on this whole article and you can get all your answers.

First of all, Linux is the most stable and secure operating system than all other operating systems. Theoretically its possible to create viruses for Linux OS, but in practically its almost impossible to attack Linux machine through a virus. So here questions is why I use  antivirus for Linux machine? For your better understanding, I am giving you some reasons:

Web Content Filtering with DansGuardian

DansGuradian is content control application to provide various kinds of web filtering. That means with Dansguardian, you can control your web services in many ways like block some urls, ipaddress, users, top level domains (.com, .net), Sub domains (porn.zz.com) etc. It also has built-in virus filtering and block functions , web site monitoring, log analysis functions. You can check log file to see what your users are doing on the internet. DansGuardain is open source software that runs in Linux, FreeBSD, OpenBSD, NetBSD, Mac OS X, Solaris, etc.

5 popular Linux Distributions: Select your Linux of choice

Now a days Linux becomes most popular operating system for all kind of users like desktop users, Server Admins, Graphics Designer, etc. .  Linux is free and opensource, anyone can build, compile its source code and distribute it to others. And that is why Linux has many variations. Today Linux systems are used in every system from embedded system to super computer. Even you can find Linux on your phone also (Android). Linux is most popular because its strong security and stability. In this article we will discuss about 5 most popular Linux Variations.

SquidGuard – A strong content filtering solution- with Mini-Howto.

In internet world filtering is very important factor, for many reasons we have to initiate filtering to safe our web life. squidguard  is a Plugins for Squid to provide strong filtering options for Administrators. Great things is that, Squidguard is free, opensource and online documentations is world class. With Squidguard you can set rules in many ways, you can block special words, any domain name, TLDs, Sub-domains etc.  SquidGuard use databases to filter any domain within this database.

How to Install and Configure OpenVPN in Linux

VPN- Virtual Private Network, and OpenVPN is an open source software application that implements VPN functionality for secure point to point connection in routed or bridged configurations. Not only linux, you can use openvpn in various platforms, like Windows, Solaris, Mac OS X. openvpn has great security features such as pre-shared security key, certificates, SSLv3/TLSv1 etc. This guide will covered simple and quickest way to install and configure VPN on Linux environment.

Step by Step installation guide of Ubuntu 11.04 Server

Now a days Ubuntu becomes more and more  popular open source operating system. Generally Ubuntu is Debian Linux Distribution base operating system.  Ubuntu server has only GUI based installation,  after installation GUI is not available unless you install a graphical desktop manager (such as gnome, KDE) later. This is true for any modern Linux, except Slackware. And also users have to choose some certain service like, DNS, LAMP (Linux Apache MySQL  PHP), Java, OpenSSH etc. This is a small tutorial with screen shot to install Ubuntu 11.04 Server on PC/Laptop. You can use same guide for any other Ubuntu version. Let’s start with minimum hardware requirements: