Virtual Subhosting
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Virtual Subhosting is one of the most powerful features of the Virtual Private Server and our Apache Web Server. This feature allows you to support multiple domain names that each resolve to their own unique subdirectories on a single Virtual Private Server. In other words, you can host bob.com and jim.com on the same Virtual Private Server, each with its own domain name and unique site content. You can also offer each Virtual Subhost customer their own unique FTP login with access to their own subdirectory and e-mail addresses using their own domain name. Please note our system also supports multi-homing.

To add another domain to your Virtual Private Server account please contact ITS Sales. Note there is a one-time fee for this service.

Limitations

For performance reasons, we have established guidelines with regard to the number of Virtual Subhosts you should place on a single Virtual Private Server. Keep in mind that these guidelines are suggested so that the performance of your own Virtual Private Server and Virtual Subhost domains is not compromised.

Server A:	around 5 low volume subhosts
Server B:	around 25 low volume subhosts
Server C:	around 60 low volume subhosts

For higher volume web sites, a lower number would apply of course. For more information, see the following.

• Limitations of Virtual Subhosting

Configuration

Configuring Virtual Subhosts need not be a daunting task. There are several methods you can use to do it. A utility that automates Virtual Subhost configuration can be easier, faster, and more user-friendly. If you require more flexibility to fine tune the setup to your exact needs, then you should configure your Virtual Subhosts by hand.

• vaddhost
  The vaddhost utility is an interactive, command-line program that automates the process of configuring Virtual Subhosts.

• Manually Configuring Virtual Subhosts
  It is possible to configure Virtual Subhosts by hand. These instructions include directions for setting up cgi-bin access, separate web server log files, and other features.

• Virtmaps - Providing E-Mail for Virtual Subhosts

Virtual Subhosting Help

The following documents provide in-depth information about Virtual Subhosting.

• Miva Empresa for Virtual Subhosts
• FrontPage for Virtual Subhosts
• Virtual Subhosting Security Issues

Please note: the information on this page applies to ITS web hosting plans. It may or may not apply to other environments. If you are looking for a feature described here, or better support from your hosting provider, please consider hosting your site with ITS!

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