Configuring an NIS Client

After you have successfully configured at least one master NIS server, you are ready to configure one or more NIS clients. The general procedure for setting up an NIS client involves the following steps:

1. Set the NIS domain name.
2. Configure and start the NIS client daemon.
3. Test the client daemon.
4. Configure the client’s startup files to use NIS.
5. Reboot the client.

The following subsections describe these steps in detail and discuss the command and configuration file syntax. Note that there is some overlap between configuring a client and a server, so discussion emphasizes client configuration tasks. The final subsection configures an example NIS client to illustrate the process of setting up a no-frills NIS client system that connects to the server configured at the end of the previous section.

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Configuring an NIS Server

The simplest NIS configuration consists of a single NIS server and one or more clients. In this case, NIS server configuration involves the following steps:

1. Setting the NIS domain name.
2. Configuring and starting the server daemon, ypbind.
3. Initializing the NIS maps.
4. Starting the NIS password daemon.
5. Starting the NIS transfer daemon if you use slave servers.
6. Modifying the startup process to start the NIS daemons when the system reboots.

If your NIS configuration also utilizes slave servers, you also need to perform configuration steps on the slave servers.

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Create a Secure Server with SSL

A secure Web server consists of two components: the SecureSockets Layer (SSL) protocol and, usually, a digital certificate from a Certificate Authority (CA). SSL provides encrypted communications and handles authentication needs between a Web browser and your Web server. A CA provides a generally accepted digital certificate and provides an additional level of authentication for your Web server because the CA guarantees that your Web server is, in fact, your Web server and not someone else’s.

To create a secure Web server, you must have at least the following four packages installed:

• apache — Provides the Apache Web server.
• mod_ssl — Installs the mod_ssl Apache loadable module, which provides strong encryption for Apache and gives Apache the ability to use SSL and its companion protocol, Transport Layer Security (TLS).
• openssl — Implements the SSL and TLS protocols and a general purpose encryption library.
• mm — Enables multiple instances of Apache to share state information.

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