91 lines
5.8 KiB
HTML
91 lines
5.8 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
|
<meta name="DC.Type" content="topic" />
|
|
<meta name="DC.Title" content="Virtual hosts on HTTP Server" />
|
|
<meta name="abstract" content="This topic provides information about virtual host types." />
|
|
<meta name="description" content="This topic provides information about virtual host types." />
|
|
<meta name="DC.Relation" scheme="URI" content="rzaieconcepts.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2002,2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2002,2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="rzaievirtualhosting" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>Virtual hosts on HTTP Server </title>
|
|
</head>
|
|
<body id="rzaievirtualhosting"><a name="rzaievirtualhosting"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Virtual hosts on HTTP Server </h1>
|
|
<div><p>This topic provides information about virtual host types.</p>
|
|
<div class="important"><span class="importanttitle">Important:</span> Information
|
|
for this topic supports the latest PTF levels for HTTP Server for i5/OS .
|
|
It is recommended that you install the latest PTFs to upgrade to the latest
|
|
level of the HTTP Server for i5/OS. Some of the topics documented here are
|
|
not available prior to this update. See <a href="http://www-03.ibm.com/servers/eserver/iseries/software/http/services/service.html" target="_blank">http://www.ibm.com/servers/eserver/iseries/software/http/services/service.htm</a> <img src="www.gif" alt="Link outside Information Center" /> for more information. </div>
|
|
<p>The concept of virtual hosts allows more than one Web site on one system
|
|
or Web server. The servers are differentiated by their host name. Visitors
|
|
to the Web site are routed by host name or IP address to the correct virtual
|
|
host. Virtual hosting allows companies sharing one server to each have their
|
|
own domain names. For example <em>www.company1.com</em> and <em>www.company2.com</em> can
|
|
both be hosted on the same server. </p>
|
|
<div class="section"><h4 class="sectiontitle">HTTP Server (powered by Apache) virtual host types</h4><p>There
|
|
are three variations of virtual hosts on HTTP Server (powered by Apache):
|
|
</p>
|
|
<dl><dt class="dlterm">IP address-based virtual host </dt>
|
|
<dd>The IP address-based virtual host requires one IP address per Web site
|
|
(host name). This approach works very well, but requires a dedicated IP address
|
|
for every virtual host. For more information on virtual hosts refer to the <a href="rzaiemod_core.htm#virtualhost"><VirtualHost></a> directive. </dd>
|
|
</dl>
|
|
<dl><dt class="dlterm">Name-based virtual host </dt>
|
|
<dd>The name-based virtual host allows one IP address to host more than one
|
|
Web site (host name). This approach allows practically an unlimited number
|
|
of servers, ease of configuration and use, and requires no additional hardware
|
|
or software. The main disadvantage to this approach is that the client must
|
|
support HTTP 1.1 (or HTTP 1.0 with 1.1 extensions) that include the host name
|
|
information inside the HTTP document requests. The latest versions of most
|
|
browsers support HTTP 1.1 (or HTTP 1.0 with 1.1 extensions), but there are
|
|
still old browsers that only support HTTP 1.0. For more information on virtual
|
|
hosts refer to the <a href="rzaiemod_core.htm#virtualhost"><VirtualHost></a> directive. <p>For information
|
|
on how to configure a name-based virtual host see <a href="rzaiejklvirtualhost.htm">JKL Toy Company creates virtual hosts on HTTP Server (powered by Apache)</a>. </p>
|
|
</dd>
|
|
</dl>
|
|
<dl><dt class="dlterm">Dynamic virtual host </dt>
|
|
<dd>The dynamic virtual host allows you to dynamically add Web sites (host
|
|
names) by adding directories of content. This approach is based on automatically
|
|
inserting the IP address and the contents of the Host: header into the pathname
|
|
of the file that is used to satisfy the request. <p>The advantages of a
|
|
dynamic virtual host are: </p>
|
|
<ul><li>A smaller configuration file so that the server starts faster and uses
|
|
less memory. </li>
|
|
<li>Adding virtual hosts does not require the configuration to be changed
|
|
or the server to be restarted. </li>
|
|
</ul>
|
|
<p>The disadvantage of a dynamic virtual host is that you cannot have
|
|
a different log file for each virtual host. For more information on dynamic
|
|
virtual hosts refer to <a href="rzaiemod_vhost_alias.htm">mod_vhost_alias</a>. </p>
|
|
<p>For information
|
|
on how to configure dynamic virtual hosts on HTTP Server (powered by Apache)
|
|
see <a href="rzaieconfigvirtualhosts.htm">Set up virtual hosts on HTTP Server (powered by Apache)</a>. </p>
|
|
</dd>
|
|
</dl>
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaieconcepts.htm" title="This topic provides concepts of functions on HTTP Server and IBM Web Administration for i5/OS interface.">Concepts of functions of HTTP Server</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |