Red Hat ENTERPRISE LINUX 4 System Administration Manual page 272

Chapter 25. Apache HTTP Secure Server Configuration
httpd-devel
The httpd-devel package contains the Apache HTTP Server include files, header files, and the
APXS utility. You need all of these if you intend to load any extra modules, other than the modules
provided with this product. Refer to the Reference Guide for more information on loading modules
onto your secure server using Apache's dynamic shared object (DSO) functionality.
If you do not intend to load other modules onto your Apache HTTP Server, you do not need to
install this package.
OpenSSH packages
The OpenSSH packages provide the OpenSSH set of network connectivity tools for logging into
and executing commands on a remote machine. OpenSSH tools encrypt all traffic (including
passwords), so you can avoid eavesdropping, connection hijacking, and other attacks on the
communications between your machine and the remote machine.
The openssh package includes core files needed by both the OpenSSH client programs and the
OpenSSH server. The openssh package also contains scp, a secure replacement for rcp (for
securely copying files between machines).
The openssh-askpass package supports the display of a dialog window which prompts for a
password during use of the OpenSSH agent.
The openssh-askpass-gnome package can be used in conjunction with the GNOME desktop
environment to display a graphical dialog window when OpenSSH programs prompt for a
password. If you are running GNOME and using OpenSSH utilities, you should install this
package.
The openssh-server package contains the sshd secure shell daemon and related files. The
secure shell daemon is the server side of the OpenSSH suite and must be installed on your host
to allow SSH clients to connect to your host.
The openssh-clients package contains the client programs needed to make encrypted
connections to SSH servers, including the following: ssh, a secure replacement for rsh; sftp,
a secure replacement for ftp (for transferring files between machines); and slogin, a secure
replacement for rlogin (for remote login) and telnet (for communicating with another host via
the Telnet protocol).
For more information about OpenSSH, see
OpenSSH website at
openssl-devel
The openssl-devel package contains the static libraries and the include file needed to compile
applications with support for various cryptographic algorithms and protocols. You need to install
this package only if you are developing applications which include SSL support — you do not
need this package to use SSL.
stunnel
The stunnel package provides the Stunnel SSL wrapper. Stunnel supports the SSL encryption
of TCP connections. It provides encryption for non-SSL aware daemons and protocols (such as
POP, IMAP, and LDAP) without requiring any changes to the daemon's code.
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http://www.openssh.com
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Chapter 20,
http://www.openssh.com/
OpenSSH, the Reference Guide, and the
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