What you need to know about Server Virtualization?
Server virtualization is not a new technique. For decades now server virtualization existed but it is only in the recent year’s server Virtualization has entered the world of Information Technology (IT). It is a still a new technology and several companies out in the market offer different approaches. Server virtualization is a hot topic in the IT world and it is expected to take the market by storm in the coming years.
Server virtualization is the process of masking of resources of the servers including processors, operating systems and number and identities of individual physical servers. The process takes place through a software application where the server administrator divides one physical server into multiple isolated virtual environments. These isolated virtual environments are called virtual servers and at times they are also known as guests, emulations, instances or cis.
There exists mainly three different ways of approach to server virtualization and they are “Virtual Machine Models”, “Virtualization at the operating system level” and “Paravirtual Machine Model”. In this article, we will read about these three approaches a little more deeply for everyone’s better understanding of the Server Virtualizationhnique.
- Virtual Machine Model– Virtual machines are mainly based on the guest paradigm where each guest runs on an imitation (virtual) of the hardware layer allowing the guest operating system to run without any modifications. The guest does not know about the operating system of the host as it is unaware of the fact that it is running on an imitation of the real hardware.
A hypervisor is used to coordinate instructions to the CPU as it requires real computing resources from the host. This hypervisor is called the Virtual Machine Monitor (VMM) and the model is based on this machine. The VMM manages all the executed codes that require extra privileges and also validates all the guest-issued CPU instructions. Microsoft Virtual Server and VMware both use the virtual machine model approach.
- Virtualization at OS level– This approach is a bit different and is not based on host/guest paradigm. In this model, a single OS kernel is run by the host at its core and the operating system functionality is exported to each of the guests.
It is important that the guest and the host use the same operating system but different distributions of the same system are allowed. This distribution architecture reduces CPU usage overhead by eliminating system calls between different layers. Virtualization at the OS-level has the ability to host thousands simultaneously. Solaris Zones and Virtuozzo uses OS-level virtualization.
- Para-Virtual Machine Model– The Para Virtual Machine Model or the PVM model is also based on host/guest paradigm using virtual machine monitor as well. In this type of model, the VMM actually modifies the codes of the guest operating system. This process is called “Porting”.
Porting utilizes privilege system calls sparingly by supporting the VMM. Likewise Virtual Machines, Para-Virtual Machines are also capable of running multiple operating systems. Para Virtual Machine model is used by a number of organizations. XEN and UML both uses PVM model.
Everything you need to know about a DDoS attack
Dedicated Denial of Services (DDoS) attack is a sophisticated hack on a website.The internet at times seems frightfully fragile and comes in the grasps of a DDoS attack. DDoS attacks have always existed over the years but in the recent times these attacks have become much more complex and increased in numbers with easy to launch techniques.
The consequences of a successful DDoS attack for any established organization is devastating and witnesses millions of dollars loss in revenue and eventually erase the existence of a once great brand. Giants like Twitter and Spotify have also experienced DDoS attacks resulting in shutting down of the website for quite a long time. DDoS attacks are predicted to get worse with time and the new era has wiped out the concept of DDoS attacks being weak threats.
DDoS attack threats are continuously growing in numbers and the statistics suggest around 50 million attacks taking place in a year summing down to one – two attacks every second. The complexity of the attacks is also increasing resulting in the vulnerability of many different parts of a company’s network. The scope and objectives of DDoS attacks are more dangerous and are often used as a diversion for illegal activities like theft and fraud. Associated costs with DDoS attacks are soaring high and are expected to move higher in the bar.
If explained in simple words procedure of a DDoS attack at the basic level is very easy to decipher. The intended recipient gets a huge amount of packets from the attacker. These packets are mostly garbage. The garbage packets keep on increasing in numbers and the server eventually fails to handle the incoming connections. Gradually the server slows down due to excessive traffic and at times totally shuts down.
In a recent case ”Dyn” (a major DNS provider ) succumbed to a DDoS attack resulting in shutting down of Twitter for a long period of time. The DDoS attack associated with Dyn was a little more complex. Owing to the popularity of the company, it is believed that Dyn certainly had very advanced systems for DDoS mitigation still they failed. It is certain that the attackers used much more than just a PC to attack such a major organization.
Back in 2011, an infamous DDoS attack took place that can easily put the security of sites to shame. The attackers did not limit themselves to taking out an individual website for a period of time but opted to take down a major piece of the internet backbone for an entire morning, not once but twice. If it’s easy for attackers to launch DDoS attacks through DDoS botnets then a huge chunk of the internet is at risk now.
There are organizations coming up every day that promises DDoS protection and the best way to protect the critical infrastructure of the network is to foresee the threats or at least be well equipped to deal with them. If the DDoS attacks can hamper giants like Dyn then this new breed of DDoS attacks is a very scary problem.
Learn Everything About SeedBox
The seedbox offers you with access to a remote high speed dedicated server which is highly useful for uploading as well as downloading of files in a secure and faster than ever with Seedbox.
A seedbox is nothing but a dedicated high-speed server. It is a remote server hosted in a high bandwidth data center mainly used for safe uploading and downloading of digital files. The main reasons for using a seedbox is for faster transfer of torrents. The need of a seedbox is not faced by all but any individual who transfers a lot of files and aspires to have a good ratio on a private bit torrent tracker he/she should consider having a seedbox. The speed of transfers through a seed box ranges something between 10Mbps- 10Gbps. If you own a seedbox you can download these files to your personal computer anonymously. Seedboxes are often complimented with other features like Open VPN, Automation tools, and even Secure Remote Desktop and more.
Seedboxes also have the ability to bypass eavesdroppers like RIAA or MPAA and also to avoid ISP throttling. If you do not have a seedbox, you are a handicap. You will eventually notice that you lack the ability to upload even if you have managed to squeeze into an elite private BT tracker like SCC, BitMeTV or TL. If you do not possess a good sharing ratio the account you hold is likely to get pruned and your days. Setting up a SeedBox is the solution to this problem. In this article, we will discuss a few reasons why you require a Seed Box and which is the best seedbox from the lot.
Advantages of having a Seedbox.
Speed- The most primary reason for setting up a seedbox is its speed which is usually numbered at 100Mbits line and even more. This number makes it much faster than any home Internet access.
Downloading and Uploading- With a seedbox, you can expect to download a 700mb file in practically flat 3 minutes. In the case of uploading, the ratio is maintained by a seedbox is healthy, which is important for the long running of the membership. You will have 1:1 ratio within the very first minutes and can rise up to a staggering 10:1 ratio within the first hour. Uploading is an important reason why people opt for setting up a SeedBox.
Competition- Private Tracking members are in a competition all the time and if you have a seedbox you can be sure to have a powerful edge. As a matter of fact with private tracking members’ seedboxes are no longer an option but a mandatory for the longer running of the accounts.