Network Security
An Introduction to DDoS – Distributed Denial of Service attack
As you might have heard, the famous blogging service WordPress.com was recently unavailable for around an hour due to a huge Distributed Denial of Service attack carried out by many infected computers on the Internet. In this article, let us look at what a Distributed Denial of Service attack is, why it is hard... »
You can use OTP – One Time Password for stronger authentication
If your finance department personnel do quite a number of bank transfers/ financial transactions over the Internet (web portal) everyday, there is a chance that their user-names/passwords can be stolen and misused. So authenticating users with just their user-names and passwords are not secure enough, at least for such critical functions. With a One... »
An illustration of DMZ : De-Militarized Zone in Computer Networking through Infographics
Well, this is not exactly Infographics! It is just an attempt to explain the basic concepts of DMZ – Demilitarized Zone (Computer Networking) through an image. These days, the web-servers and mail servers (which form the common components of DMZ) are mostly hosted in a cloud/ Data-Center environment. But a DMZ can be even... »
Subdivide your Physical Firewall into multiple Virtual Firewall instances
In bigger organizations and service providers, multiple Firewalls are routinely utilized for each department or class of subscribers as some of them require individual Firewall policies. And more importantly, they want to administer, monitor and manage their own Firewall in order to have a full control over the types of traffic traversing over their... »
An Introduction to SIEM – Security Information & Event Management
Logs are generated by a lot of devices in an organization. In one branch alone, there are so many devices (Like Router, Firewall, IDS, etc) that can generate a lot of logs which needs to be tracked constantly, for unauthorized access, indications of network threats, etc. Occasionally, it may even be required to find... »
An Overview of Enterprise VPN – Virtual Private Network
A VPN (Virtual Private Network) is a concept which helps enterprise companies with distributed offices to connect to each other securely - In this article, we would touch upon introduction and advantages of VPN, popular ways of establishing a VPN, types of VPN, advantages of SSL and IPSec VPN and disadvantages of VPN. Read... »
Snort – Open Source Intrusion Detection System
This article gives an overview about Snort which is an software based freely downloadable open source Network Intrusion Detection system along with its components, installation ways and methods, modes of operation etc. »
An overview of IPS – Intrusion Prevention System and types of Network Threats
This article gives a general introduction to IPS - Intrusion Prevention System for Network Security and also gives a list of network threats that can be identified and mitigated by such Intrusion Prevention Systems. »
Hardware Vs Sofware UTM and Open Source UTM
This article is about the two types of Unified Threat Management solutions (UTM) - hardware and software. We will discuss the plus and minus points of both of them. We will also have a look at the open-source UTM for SMB, which you can download and install free of cost. »
An Introduction to Unified Threat Management in Network Security
In this article, we have a look at a broad range of network security threats that concerns an enterprise user, what is Unified Threat Management (UTM) and why it is required, the types of UTM - hardware based, software based and distributed model, and the advantages and limitations of UTM based network security solutions. »
