Make a web site - 374 Part III . Choosing and Installing a
374 Part III . Choosing and Installing a Linux Distribution critical because your other file systems will mount from this. You generally want to have your root partition consume the rest of the hard drive unless you are creating more partitions. Additional partitions are optional. 9. Configure the firewall. A firewall acts as a conduit between your computer and other computers that request access to the services it is providing. If you are connected to the Internet or other networks, enable your firewall. Even if you are not connected to an untrusted network, you should enable the firewall in case you connect at a later date. Two choices are available in this section: No firewall Don t choose this option, because it does not check against requests for services. Even if your system is not currently providing services, it s best to not select this option (things can change as the system grows). Enable firewall The preferred selection. It provides a modicum of security against malicious entities that may want to attack your systems. Only the default services are allowed at this level, and you can configure access for more services as needed. Some of the defaults are: Remote login (SSH) An encrypted protocol that replaces the vulnerable telnet protocol. With SSH you can log in to the system with an interactive shell, as well as securely transfer files interactively (SFTP) or noninteractively (SCP). For more information on this, type man ssh at the command line after installation. When SSH is unchecked, you can still use these utilities on outgoing connections. This controls only incoming requests from outside your computer. If you need to access your system remotely, you can choose this, but it is best to leave it unchecked for security reasons. The same applies to the other options presented. Web Server (HTTP, HTTPS) Allows your system to serve regular (HTTP) Web pages or encrypted (HTTPS) Web pages. Unless you need to run a Web server, it is recommended that you do not check this. File Transfer (FTP) Allows users to interactively log in to your system and transfer files. This protocol is unencrypted and not needed by most users. If you must allow file transfers, SFTP (provided with SSH) is the preferred method because the password and username are sent encrypted. Mail Server (SMTP) Allows your system to accept mail requests or mail relay requests. You can still send and receive mail if you do not check this; it just allows your machine to act as a mail server. If you install and improperly configure SMTP, your system can become a spam relay, so only more experienced users should check this. These settings can be reconfigured later using iptables. See the man page for iptables for more information. Note Note
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