Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Scaricare il pdf (Pagina 196)

196 Chapter 15. Apache

You cannot use name-based virtual hosts with your secure server because the SSL handshake (when

the browser accepts the secure Web server’s authenticating certiﬁcate) occurs before the HTTP

request which identiﬁes the correct name-based virtual host. In other words, authentication occurs

before there is any identiﬁcation of different name-based virtual hosts. If you want to use virtual hosts

with your secure server, you will need to use IP address-based virtual hosts.

If you are using name-based virtual hosts, uncomment the NameVirtualHost conﬁguration directive

and add the correct IP address for your server after NameVirtualHost. Then add more information

about the different domains using the VirtualHost tags which surround the ServerName for each

virtual host, plus any other conﬁguration directives which are only applicable to that virtual host.

15.3.76. VirtualHost

VirtualHost and /VirtualHost tags surround any conﬁguration directives which are in-

tended to apply to a virtual host. Most conﬁguration directives can be used within virtual host tags,

and then they only apply to that particular virtual host.

A set of commented out VirtualHost tags surround some example conﬁguration directives and

placeholders for the information you would need to ﬁll in to set up a virtual host. Please see Section

15.5, for more information about virtual hosts.

15.3.77. SetEnvIf

The Apache conﬁguration directive SetEnvIf can be used to set environment variables based on

headers in the request. In the supplied httpd.conf ﬁle, it is used to disable HTTP keepalive and to

allow SSL to close the connection without a close notify alert from the client browser. This setting is

necessary for certain browsers that do not reliably shut down the SSL connection.

15.3.78. SSL Conﬁguration Directives

The SSL directives in your server’s httpd.conf ﬁle are included to enable secure Web communica-

tions using SSL and TLS.

For more information on SSL directives, please point your browser to

http://localhost/manual/mod/mod_ssl/. More information on SSL directives is also available

at http://www.modssl.org/docs/2.8/ssl_reference.html, a chapter in a Web document about

mod_ssl by Ralf Engelschall. The same document, the mod_ssl User Manual, begins at

http://www.modssl.org/docs/2.8/ and is a great reference source for mod_ssl and for Web

cryptography in general.

Note

Do not modify your SSL directives unless you are absolutely sure about what you are doing. In most

cases, the SSL directives are conﬁgured appropriately as installed.

1 2 ... 191 192 193 194 195 196 197 198 199 200 201 ... 281 282

Nessun commento

Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Pagina 196