Introduction IP spoofing is one of the strategies that can be employed in the culmination of diverse types of cyber attacks. The knowledge of what IP spoofing means, how it is done, and how to avoid ...

Network geeks among you may remember my article, “Linux Socket Filter: Sniffing Bytes over the Network”, in the June 2001 issue of LJ, regarding the use of the packet filter built inside the Linux ...

If it's true that external packet must first traverse my filtering rules, what interface will the packet arrive to my WinXP box from? By virtue of being redirected to an internal address does PF ...

Learn how firewalls have progressed from simple packet filtering to more sophisticated application-level filtering. Webopedia.com defines a firewall as “a system designed to prevent unauthorized ...

Countless pieces of software, protocols and complex interdependencies together form a system for which it is difficult to guarantee any particular property—particularly security. Even software ...