Fred Stluka from Bristle.com just introduced me to port knocking — a method of opening ports on a firewall by trying to connect with a series of ports in a pre-determined order. The sequence of ...

When dealing with computer security, you should assume that hackers will be trying to get in through any available doors your system may have, no matter how many precautions you might have taken. The ...

Firewall administrators are challenged to balance flexibility and security when designing a comprehensive rule set. A firewall should provide protection against malfeasants, while allowing trusted ...

Requiring a "combination" before connecting clients to network services is a good idea -- it can't hurt, and it just might help Many, many innovations come from the Linux and Unix world. Few are more ...

Many, many innovations come from the Linux and Unix world. Few are more intriguing to me than port knocking. As a global security plug-in to protect services, it has a lot going for it and few ...