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الثلاثاء، 31 أغسطس، 2010

what is shared hosting

alot of the ample hosting companies use their own custom developed ascendancy panel. Ascendancy panels and web interfaces can account altercation however, back web hosting companies sometimes advertise the appropriate to use their ascendancy console arrangement to others. Attempting to charm the functionality of a specific ascendancy console is common, which leads to abounding lawsuits over apparent infringement.

In aggregate hosting, the provider is about amenable for managing servers, installing server software, aegis updates, abstruse support, and added aspects of the service. Most servers are based on the Linux operating arrangement and LAMP (software bundle), which is apprenticed by the low amount of accessible antecedent software. But some providers action Microsoft Windows-based or FreeBSD-based solutions. For example, the Plesk ascendancy console is accessible for two operating systems, Linux and Windows. Versions for either OS accept actual agnate interfaces and functionality, with the barring of OS-specific differences (for example: ASP.NET, SQL Server and Access abutment beneath Windows; MySQL beneath Linux).

There are bags of aggregate hosting providers in the United States alone. They ambit from mom-and-pop shops and baby architecture firms to multi-million-dollar providers with hundreds of bags of customers. A ample allocation of the aggregate web hosting bazaar is apprenticed through pay per bang (PPC) announcement or Affiliate programs.

Shared web hosting can additionally be done abreast by administration the amount of active a server in a colocation centre; this is alleged accommodating hosting.

Name-based virtual hosts have some disadvantages:

They do not properly support secure websites (HTTPS). All name-based virtual hosts using the same IP address must share the same digital certificate. This is because the SSL/TLS handshake takes place before the hostname is sent to the server. Thus the server doesn't know which encryption key to use when the connection is made. An extension to the TLS protocol, part of RFC 3546 - Transport Layer Security (TLS) Extensions, specifies a way for the client to provide the requested host name as part of the handshake, but it is not yet widely implemented. Some of the shared hosting providers require their customers to get Unique IP in order to properly set up HTTPS.

If the Domain Name System is malfunctioning, it is harder to use a name-based virtually-hosted website. Ordinarily, in this case, the user could fall back to using the IP address to contact the system, as in http://192.0.2.0/ (invalid IP for example only). However, the web browser doesn't know what hostname to send to the server, but a name-based virtual host requires it. In this case, the default web host is sent back to the browser for that IP address. Therefore most hosters offer an alternative access method like http://192.0.2.0/~virtualhostname to provide access in such cases.

They will not work with browsers that do not send the hostname as part of requests. This is true for older HTTP/1.0 browsers that have not retrofitted the host field feature from the HTTP/1.1 protocol. (The "Host" header that distinguishes between various DNS names sharing a single IP address was optional in HTTP/1.0; it is mandatory in HTTP/1.1, issued in 1999 as RFC 2616.) Since nearly every webbrowser that is currently used supports the protocol and thus also virtual hosting, this is not a real issue.

Improperly configured file permissions with shared file systems might give other (compromised) users or processes system-wide access to these files, such as credential files for database access


what is shared hosting

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