Red Hat NETWORK PROXY SERVER 3.7 - Uživatelský manuál stáhnout pdf (Strana 47)

2.6 Using Virtual Hosts 37

machine. If you’re interested in using virtual hosts for different IP ad-

dressesor differenthost names onyour machine, moreinformation is pro-

vided in the Apache documentation on your machine or on the web at

http://www.apache.org/docs/vhosts/index.html.

Virtual hosts are conﬁgured within the httpd.conf ﬁle, as described in

section 2.2 on page 17. Please review the pertinent points in that section

beforeyoustartto changethevirtualhosts conﬁgurationonyour machine.

The default conﬁguration of your secure web server uses virtual hosts to

run two web servers: a secure web server and a non-secure web server.

Both servers use the same IP address and host name, but they listen on

different ports. This conﬁguration enables you to serve both secure and

non-secure documents in the most efﬁcient manner possible. As you may

know, secure HTTP transmissions take more time than non-secure, be-

cause a lot more information is being passed back and forth during the

securetransaction. So using asecureweb serverfor non-secureweb trafﬁc

is not a good idea.

As installed, your secure web server is conﬁgured to operate in both se-

cure and non-secure modes. The non-secure web server is conﬁgured as

the ”non-virtual” host in the httpd.conf ﬁle. In other words, the non-

secure web server’s conﬁguration options are outside of the virtual host

tags in httpd.conf. If you want to change something about your non-

secure web server, you’ll need to change the conﬁguration directives in

httpd.conf outside ofthe virtualhost tags. Your non-secure web server,

by default,listens on port 80, the default port for non-secure web commu-

nications.

Yoursecurewebserverisconﬁguredas a virtualhost in httpd.conf. The

conﬁguration options for your secure web server are contained within the

virtual host tags inthe httpd.conf ﬁle. If you need to changesomething

about the conﬁguration of your secure web server, you’ll need to change

theconﬁgurationdirectivesinsidethevirtualhosttagsinthehttpd.conf

ﬁle. Your secureweb server,bydefault,listens on port443,thedefaultport

for secure web communications.

By default, the secure and the non-secure web server share the same

DocumentRoot, a conﬁguration directive speciﬁed in httpd.conf.In

other words, the secure and the non-secure web server look in the same

place for the HTML ﬁles that they are going to provide in response to

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Red Hat NETWORK PROXY SERVER 3.7 - Uživatelský manuál Strana 47