Scripts come in another flavor as well: prewritten code that exploits a vulnerability and
gives its users special privileges on the compromised machine. These scripts are rarely
used by their creators. They get posted online for the aforementioned script kiddies, who
use them to invade vulnerable systems and brag about it to their friends.
Your job as a system administrator is to keep your computers and local networks from
being compromised by worms, script kiddies, and the more serious attacks conducted by
more experienced criminals. Your users (even if it??™s just you) want to use the computer to
accomplish great things and not worry about the firefights outside. Wearing your sysadmin
hat, you can accomplish this task.
Regardless of the source of the attack, you can follow a five-step checklist to secure your
openSUSE Linux box:
1. Assess your vulnerability. Decide what machines can be attacked, what services they
are running, and who has access to them.
2. Configure the server for maximum security. Install only what you need, run only
what you must, lock down applications to make sure they cannot be misused, and
configure a local firewall.
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