Red Hat LINUX ES 2.1 -, Installation Manual

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Chapter 3. Installing Red Hat Enterprise Linux ES 37
WWW (HTTP)
The HTTP protocol is used by Apache (and by other Web servers) to serve webpages. If
you plan on making your Web server publicly available, enable this option. This option is
not required for viewing pages locally or for developing webpages. You will need to install
the
apache
package if you want to serve webpages.
Mail (SMTP)
If you want to allow incoming mail delivery through your firewall, so that remote hosts can
connect directly to your machine to deliver mail, enable this option. You do not need to
enable this if you collect your mail from your ISP’s server using POP3 or IMAP, or if you
use a tool such as
fetchmail
. Note that an improperly configured SMTP server can allow
remote machines to use your server to send spam.
FTP
The FTP protocol is used to transfer files between machines on a network. If you plan on
making your FTP server publicly available, enable this option. You need to install the
wu-
ftpd
(and possibly the
anonftp
) package for this option to be useful.
Other ports
You can allow access to ports which are not listed here, by listing them in the
Other ports
field. Use the following format:
port:protocol
. For example, if you want to allow
IMAP access through your firewall, you can specify
imap:tcp
. You can also explic-
itly specify numeric ports; to allow UDP packets on port 1234 through the firewall, enter
1234:udp
. To specify multiple ports, separate them with commas.
3.18. Language Support Selection
Red Hat Enterprise Linux ES can install and support multiple languages for use on your system.
You must select a language to use as the default language. The default language will be used on
your Red Hat Enterprise Linux ES system once installation is complete. If you choose to install other
languages, you can change your default language after the installation.
If you are only going to use one language on your system, selecting only that language will save
significant disk space. The default language is the language you selected to use during the installation.
However, if you select only one language, you will only be able to use that specified language after
the Red Hat Enterprise Linux ES installation is complete.