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Unit 1: Installing Linux
Notes
Figure 1.8: A Manually Configured Network Interface
Source: http://www.net-security.org/dl/reviews/0764543784.pdf
Network Security
Various major distributions of Linux – strive to make configuring your network security as easy
as possible. To customize the firewall, simply select the services you want to run on this machine;
alternatively, you can simply disable the firewall, which will leave the machine open and
vulnerable to hacker attacks. You can also choose to enable Security Enhanced Linux (SELinux),
which can help to minimize any damage caused if hackers gain control of parts of the system.
Note that SELinux should not be considered an alternative to a firewall – neither the firewall,
nor SELinux, makes your system completely secure, so it’s best to enable them both. For our
purposes, you should only allow Remote Login and Web Server traffic through the firewall, and
set Enable SELinux? to Active, as illustrated in Figure 1.9.
Figure 1.9: Setting Server Security Options
Source: http://www.net-security.org/dl/reviews/0764543784.pdf
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