The Cloud Proxy server

In computer networks, a proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from other servers. A client connects to the proxy server, requesting a service, such as a file,

connection, web page, or other resource available on a different server and the proxy server evaluates the request as a way to simplify and control its complexity. The representation were invented to add structure and encapsulation for distributed systems.Currently, most Web proxies are proxy, providing access to content on the World Wide Web and provide anonymity.

Representation types

A proxy server can reside on the user's local computer or at various points between computer and destination servers of Internet users.

• A proxy server that forwards requests and replies unmodified is usually called a proxy gateway or sometimes tunneling.
• A proxy is a proxy oriented Internet to recover a wide range of sources (in most cases, anywhere on the Internet) to the front.
• A reverse proxy is typically an Internet-facing proxy used as a front end to control and protect access to a server on a private network. A reverse proxy is alaso commonly performed tasks such as load balancing, authentication, decryption or caching.  

Reverse proxies

An Internet connection proxy server to an internal network.
A reverse proxy taking applications over the Internet and sent to the server on an internal network. These applications connect to the proxy and may be unaware of the internal network.
Main article: Reverse Proxy

A reverse proxy (or surrogate) is a proxy server appears to clients to be a common server. Applications are sent to one or more proxy servers that processed the request. The response from the proxy server returns as if it came directly from the proxy server, which allows the client does not know the origin servers. Reverse proxies are installed in the neighborhood of one or more web servers. All Internet traffic with a destination of one of the district's Web servers through the proxy server. The use of "reverse" his counterpart comes "forward proxy" reverse proxy is closer to the web server and is used only a limited set of sites. There are many reasons for installing reverse proxy servers:

    Acceleration / SSL Encryption: when certain websites are created, SSL encryption is often done by the Web server itself, but by a reverse proxy that is equipped with SSL acceleration hardware. See Secure Sockets Layer. In addition, a host can provide a unique "SSL proxy" to provide SSL encryption for an arbitrary number of hosts eliminating the need for an SSL certificate separately for each host server, with the disadvantage that all hosts behind the proxy SSL must share a common DNS name or IP address for SSL connections. This problem can be partially solved by using the function of SubjectAltName X.509 certificates.
    Load balancing: the reverse proxy can distribute the load across multiple Web servers, each Web server uses its own application domain. In such a case, the reverse proxy may have to rewrite the URLs for each site (translation externally known URLs for internal locations).
    Serve / cache static content: A reverse proxy can download static content web servers storing images and other content as static graphics.
    Compression: the proxy server can optimize and compress content for faster loading times.
    Spoon feeding: reduces resource usage caused by slow clients on Web servers storing the contents of the Web server sent and gradually "spoon feeding" for the customer. This benefits especially dynamically generated pages.
    Security: the proxy server is an additional layer of defense and can protect against certain specific OS and Web server attacks. However, it provides no protection against attacks on the web application or service itself, which is generally regarded as the greatest danger.
    Editorial Extranet: a reverse proxy server from the Internet can be used to communicate with a server internal security organization, providing extranet access to certain functions, keeping the servers behind the firewall. When used in this manner, security measures should be considered to protect the rest of your infrastructure if that server is compromised, your web application is vulnerable to attacks from the Internet.

Read More

The Virtual private server hosting

A virtual private server (VPS) is a virtual machine that is sold as a service for Internet hosting service.
A VPS runs its own copy of an operating system, customers have access at the root for this instance of the operating system, so they can install almost any software that runs on this system exploitation. For many applications that are functionally equivalent to a dedicated physical server, being defined by software and are able to be more easily created and configured. They are priced much lower than equivalent physical server, but since they share the underlying hardware with another VPS, performance may be lower and may depend on the workload of the other instances on the same hardware node.

 Virtualization

The driving force behind server virtualization is similar to that which led to the development of time-sharing and multiprogramming in the past. Although resources are still divided, as in the model time-sharing, virtualization provides a higher level of security, depending on the type of virtualization used, the individual virtual servers are mostly isolated from each other and can manage its own system full operation can be rebooted independently as a virtual instance.Partition of a single server to appear as multiple servers has been increasingly common in personal computers since the release of VMware ESX Server 2001. The physical server typically a hypervisor is responsible for creating runs, release and management resources "guest" operating systems or virtual machines. These guest operating systems are for a share of the resources of the physical servers, usually in a way in which the customer is not aware of any other physical resources except those assigned to it by the hypervisor. As a VPS runs its own copy of its operating system, customers have access to the root of this instance of the operating system and can install almost any software that runs on the operating system, but because of the number of clients typically run virtualization on a single machine, a VPS generally has little processor time, RAM and disk space. [1]Although VMware and Hyper-V virtualization internal corporate dominate, it is less common for providers of VPS, mainly because of the costs and limitations - which usually use products like OpenVZ, Virtuozzo, Xen or KVM.

Accommodation

Main article: Comparison of virtualization software platformMany companies offer virtual hosting virtual private server or dedicated server hosting as an extension of the web hosting services. There are many challenges to consider licensing of proprietary software in virtual environments with multiple tenants.With accommodation unmanaged or self-managed, the customer is allowed to manage their own server instance.Unlimited hosting is usually offered with no limit on the amount of data transferred through a fixed broadband line. Usually hosting unlimited [2] it is 10 Mbit / s, 100 Mbit / s or 1000 Mbit / s (with some up to 10 Gbit / s). This means that the customer is theoretically able to use ~ 3.33 TB of 10 Mbit / s, 33 ~ TB 100 Mbit / s ~ 333 TB in a line of 1,000 Mbit / s per month (although in practice the values ​​will be significantly less). In a virtual private server, bandwidth is shared (should) say it is not a fair usage policy involved. Unlimited hosting is also commonly marketed but generally limited by the policies and conditions of use of acceptable service. It offers unlimited and wide band gap are still incorrect because of the cost, support capabilities and technological limits.Cloud serversMain article: Cloud computingA VPS is dynamic (ie, that can be modified at runtime) is often considered a cloud server. Key attributes of this are: [3]

    Additional resources can be added to hardware performance (CPU, RAM)
    Server can be moved to other material while the server is running (automatically according to the load in some cases)Digital Ocean invented drops is a key to its virtual private servers term. Essentially a visible mass of water droplets suspended in the atmosphere above the surface of the earth is a cloud. [4] This definition of short-term weather serves a verbal image drops ocean is a digital key in the digital cloud.

Read More

Cloud Web Hosting Services

Cloud computing allows the application software to be operated using Internet-enabled devices. Clouds can be classified as public, private and hybrid.
 A web hosting service is a type of internet hosting service that allows individuals and organizations to make their website accessible via the World Wide Web.

Web hosts are companies that provide space on its own server or leased for use by customers and Internet connectivity, typically in a data center. Web hosts can also provide data center space and internet connectivity to other servers in their data center, called roommate, also known as housing in Latin America or in France.
The scope of web hosting services varies widely. The most basic is web page hosting and small scale file, where files can be uploaded via File Transfer Protocol (FTP) or a Web interface. The files are usually delivered to the Web "as is" or with minimal processing. Many Internet service providers (ISPs) offer this service free to subscribers. Individuals and organizations can also obtain Web page hosting alternative service providers. Personal web hosting sites is usually free, ad-sponsored, or inexpensive. Business web hosting often has a higher expense, depending on the size and type of site.
Single page hosting is generally sufficient for personal web pages. A complex site calls for a more comprehensive package that provides support platforms and the development of database applications (eg PHP, Java, Ruby on Rails, ColdFusion or ASP.NET). These facilities allow the customers to write or install scripts for applications like forums and content management. Additionally, Secure Sockets Layer (SSL) is generally used for e-commerce.
The host may also provide an interface panel or management control of the Web server and installing scripts as well as other modules and service applications like e-mail. Some hosts specialize in certain software or services (eg e-commerce), which are commonly used by large companies to outsource network infrastructure.

Read More

Web Hosting with HostGator is a Houston-based

HostGator is to provide a shared, reseller, virtual private server based in Houston, and dedicated web hosting with additional presence in Austin, Texas.

History

Founded in 2002 by Brent Oxley HostGator, who was then a student at Florida Atlantic University. In 2006, HostGator has passed the 200,000 recorded in the zones.

In 2007, the company moved from its original office in Boca Raton, Florida, in the new office building of 20,000 square feet in Houston, Texas.

In 2008, HostGator company ranked No. 21 in the magazine in the US and # 1 in the Houston-Sugar Land-Baytown, Texas, in the list of fastest growing companies. In the same year, I decided to make Hostgator Hosting their green credentials by working with an integrated service market ecosystem services. Also in 2008, HostGator strong competition varies companies themselves to provide hosting services "unlimited" prepared. He was the founder Brent Oxley,

emphasizing the ability to save a copy of the "unlimited" option before providing the service named as such and to increase the number of employees. He stressed that the movement increased its sales by at least 30%.

2010 saw the addition of another office Hostgator - this time in Austin, Texas

In 2011, the operations in India and HostGator Hostgator.in through the establishment of offices and support data center. Headquarters India is located in Nashik, Maharashtra.

At June 21, 2012, CEO and founder Brent Oxley announced the impending sale Endurance International Group dedicated and knowledgeable staff and users do not have to worry about in part because Oxley still own the buildings used Hostgator. He said he wants to travel the world before having children. He was also frank about the inability to create a stable bills and coins deposited HostGator, and expressed the hope of endurance can fix these characteristics.

On 26 August 2013, HostGator has been one of the first companies to successfully relieve blacklisted IP. Using a large number of IP gateways for e-mail addresses on almost every host in the world, was blacklisted and on multiple networks. From 2013, HostGator hosts over 9,000,000 domains.

Read More

Définition What is hybrid cloud united state

Hybrid Cloud is a cloud computing environment that uses a mix of onsite, private cloud and public services cloud orchestration between the two platforms. To allow workloads to move between private and public clouds, and the needs and IT costs are changing, hybrid cloud offers companies greater flexibility and deployment options data.

For example, a business may implement a private cloud on-site to host sensitive or critical workloads, but the use of a third party provider such as Google Compute Engine public cloud hosting less critical, such as loading resources testing and development work. To maintain customer facing and backing up data files,

a hybrid cloud could also use the Amazon Simple Storage Service (Amazon S3). A layer of software, such as eucalyptus, private cloud can facilitate connections to public clouds such as Amazon Web Services (AWS).

Hybrid cloud is especially useful for dynamic loads or rapidly changing work. For example, an entry system transaction orders that are experiencing significant demand peaks around the holiday season is a good candidate hybrid cloud. The application can work in the private cloud, but the cloud burst use to access additional computing resources from a public cloud computer when peak demand. To connect the private and public cloud resources, this model requires a hybrid cloud environment.

Otherwise, use the hybrid cloud is the large data processing. One company, for example, could use the hybrid cloud storage to preserve their accumulated business, sales, testing and other data, then execute analytic queries in the public cloud that can scale to support the demanding tasks of distributed computing.

The flexibility and scalability of the public cloud eliminates the need for a business to make massive to accommodate short-term peaks in demand investments. Supplies of public cloud computing providers resources, and the company pays only for the resources they consume.
Despite its advantages, the hybrid cloud may present technical, commercial and management challenges. Workloads private cloud need to access and interact with providers of public cloud, hybrid cloud therefore requires the compatibility of the API and robust network connectivity.
For the cloud hybrid of public cloud connectivity problems possible violations of the SLA and other interruptions in the public cloud service possible. To mitigate these risks, organizations can work loads hybrid architect interacting with various public cloud providers. However, this may complicate the design and testing workload. In some cases, the workload scheduled for the hybrid cloud must be redesigned to meet specific API providers.
Management tools such as Egenera PAN Manager cover, RightScale Cloud Management Platform and Enterprise Cloud Management Scalr help companies manage workflow creation, service catalogs, billing and other tasks related to the hybrid cloud.

Read More