Every corporate office has a official public website which can be accessed by every individual using public internet. Data related to this site has to be stored in servers and the location of these servers is a challenge! The challenge is servers have to be accessible by the public users but they should not disturb the internal network of the organization in other words an attacker from internet should not be able to reach the internal network through these servers. Then came the concept of DMZ. It is a zone that lies between an organization’s internal network and an external network, usually the Internet
Concept of DMZ :
In military terms, a De-Militarized zone (DMZ) is an area, usually the frontier or boundary between two or more military powers (or alliances), where military activity is not permitted, usually by peace treaty or other bilateral or multilateral agreement
In a computer network apart from the Internet and Intranet there exists De-militarized zone which has the security protection level lying in between the Intranet and the Internet. The Intranet is a High security zone where the internal host systems, servers etc., of an organization are present and which are to be secured from the attacks or threats. Internet is an outside public network which is considered as a low security zone.
Traffic flow in DMZ installed networks:
- Internal hosts can access DMZ and internet.
- External hosts can access only DMZ not the intranet.
- DMZ hosts can access internet only.
STUXNET – a highly sophisticated computer virus has created a havoc in Iran since it had attacked the Nuclear plant in Iran and led to misoperation and finally shut down. This malware was basically meant to attack the SIEMENS systems which the Nuclear Plant used and attacked the PLC ( Proggamable Logic control ) unit of the hardware.
Many believe that this virus was intentionally created by USA and ISRAEL to attack IRAN’s nuclear power ( Which was reported that the innovations in Nuclear domain has gained a straight 60% increase than its previous year in 2009 ). So these counter contries wanted to attack the power of IRAN.
Celkon in the Mobile market is famous for its lower cost of mobiles…. It has been a big hit in other parts of INDIA except Southern States, also in other neighbouring countries. Celkon has already introduced Android range of Smart Phones with the series A , among its class of Android phones A 19 has been a hit in the market with its specifications competing with other smart phones from SAMSUNG, HTC, SONY etc.,
Apple’s mystery mini-tablet hasn’t emerged yet, and there are still plenty of unknowns surrounding it. Here are the biggest unanswered questions.Let’s
go through them before we get the official launch on 23rd OCT 2012(Tomorrow).
VIRTUALIZATION is the key factor attracting the IT world. It has really turned around the way IT used to deliver services and now it is delivering services. The Enterprise world has changed from what IT used to be a support for proper functioning of the Front End operations to it being a Service ( prominently named as ITaaS – IT as a service ).
Definition of Virtualization :
Virtualization is the creation of a virtual (rather than actual) version of something, such as an operating system, a server, a storage device or network resources.
What exactly is a fuel cell, anyway? Why are governments, private businesses and academic institutions collaborating to develop and produce them? Fuel cells generate electrical power quietly and efficiently, without pollution. Unlike power sources that use fossil fuels, the by-products from an operating fuel cell are heat and water. But how does it do this?
Facebook showed working prototype of Open Rack, an energy efficient server that’s intended to power data centers which can theoretically scale to more than 100,000 physical machines.
OpenRack is very much a work in progress. The current rack uses Facebook’s third and so-far most compact generation of a two-socket x86 server. Engineers here already envision a fourth generation that shrinks the server design yet again. Ideally, the board would contain only processors and a PCI Express fabric, no Ethernet or other components—but that will require a variant of Express that is only on the drawing board today.
- Each OpenVault tray has control electronics on a slide-out board. In future, the board could host an ARM-based controller to handle special storage functions. Facebook believes such an application could become its first use of an ARM SoC.
- Specifically, they expect to move from 250-500 Gbyte hard drives—the smallest they can now get—to 128 Gbyte serial ATA SSDs which have enough capacity and might even be cheaper.