Security options

If you decide to take advantage of a built-in firewall like that included in the RHEL distribution, make sure that you configure it to allow access to the applications you'll be running on the server. In this example, we've allowed Web, FTP and SMTP email traffic through.

Note that Red Hat Enterprise Linux and some other implementations can also be secured using a technology called SElinux (Security Enhanced Linux). This blocks unauthorised changes to the operating system, but management is a little more complicated so apply with caution.