Linux Server Security, Second Edition

This is the Title of the Book, eMatter Edition

Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.

FTP Security

|

383

Besides the <VirtualHost> configuration block itself, whose syntax is fairly obvious

(you must specify the IP address or resolvable name of the virtual host), you’ve seen

all these directives in earlier examples. Even so, two things are worth pointing out.

First, the IP specified in the

<VirtualHost> tag can be the host’s primary address—i.e.,

the IP of the base server. However, if you do this, you must use the

Port directive to

specify a different port from the base server’s in the virtual host setup. A virtual server

can have the same IP address or the same listening port as the base server, but not both.

Second, absent from this configuration block but implicit nonetheless are the set-

tings for

ServerIdent, AllowRetrieveRestart, MaxClients, MaxClientsPerHost, Umask,

User,andGroup, defined earlier in the <Global> definitions in Example 11-5 (so are

the first eight directives listed in Example 11-4).

By the way, you may have noticed that I didn’t bother specifying

ServerName or

Masquerade Address. Since the global ServerIdent setting is off, these wouldn’t be dis-

played anyway.

Creating IP aliases in Linux is simple. The most direct method is to

use this form of ifconfig:

ifconfig ifacename:n alias

where ifacename is the name of the physical interface to which you

wish to ...