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8. Networking

Before you even consider attaching your Libretto to a network, install all of Red Hat's security-related updates, protect all accounts with good passwords, turn on shadow passwords (run /usr/sbin/pwconv to do this), and deny access to your Libretto from outside by editing /etc/hosts.deny so that it contains the single line


You can then allow local access by editing /etc/hosts.access so that it contains the single line


With files set up in this way, your Libretto should be reasonably secure while you decide what security policies you may wish to adopt in the long run.

TCP/IP networking using a PCMCIA Ethernet card is straightforward. Insert your Ethernet card, physically connect it to your network, then use Red Hat's X11-based netcfg utility (also available from the control-panel application) to set up networking. If you prefer not to use netcfg, see the NET-3-HOWTO for details on setting up your configuration files.

8.1 Netscape

You can download Netscape's Navigator web browser (or the entire Netscape Communicator suite) for Linux from Red Hat's or Netscape's web sites. Netscape 4.04 installs and runs well under RHL 5.0, although you should avoid transferring Netscape configuration files from another system, since doing so may make it difficult to configure Netscape properly for the Libretto's 640x480 screen.

8.2 SSH

If you use your Libretto for remote access to other computers, ssh is a much better choice than the traditional telnet, for security reasons. Visit the Ssh (Secure Shell) Home Page,, for information and links to sites from which ssh may be downloaded freely. The current version, ssh-1.2.25, compiles and works without problems on the Libretto.

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