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 ...

I am currently running a USB ADSL (static IP I beleive - 62.xx.xx.xx) service to other PCs on the network via Winroute Pro running on windows 2K advanced server. (ADSL to Server to Switch to 3 PCs - ...

Stateful packet filtering relies upon the maintenance of a state table. This is part of the firewall’s internal structure and it tracks all of the various sessions and inspects all packets that pass ...

“[A] person of ordinary skill would have understood that in both the ‘713 patent and Sourcefire, the relevant data is located in the first packet of the message . . . [and] would have been ...

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 ...

Filters can permit or deny virtually any kind of traffic – up to a point. Here are some basic dos and don’ts for filter usage. Filters can permit or deny virtually any kind of traffic – up to a point.