FreeOS.com: Network monitoring, access control, and booby traps using TCP Wrappers

[ Thanks to Trevor
Warren for this link. ]

“TCP Wrappers is one of the most common methods of access
control on your Unix box. A wrapper program ‘wraps’ around existing
daemons and interfaces between clients and the server. Good access
control and logging are strong points. In this first part, we
introduce you to the concept behind TCP Wrappers.“

“What according to you would be the best way to fortify your
machine from the anarchy of the Internet? Let’s look at a few
options.”

“You could put in a well configured firewall. Though this is
quite a complex procedure, it’s worth going through the pain. And
there will be pain. Putting down your organizational policies and
framing rulesets that keep the bad guys out and lets the good guys
in, requires a lot of thinking on your part. Experience has taught
us to verify our rulesets again and again, because even one slip
during the framing of the rulesets can bring the house down. At the
end of the day, you’ll be the only punching bag around.”

Complete
Story