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 ...

When deciding on a firewall implementation, most Unix-savvy administrators have usually chosen to use ipfilter on OpenBSD for their combination of capabilities and stability, as the capabilities of ...

PLANO, TEXAS / ACCESS Newswire / December 10, 2025 / Intrusion Inc. (NASDAQ:INTZ) (“Intrusion” or the “Company”), a leader in cyberattack prevention solutions, announced today the general availability ...

“[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 ...

Version 2.6.12 of the Linux kernel is likely to include packet filtering that will work with IPv6, the latest version of the Internet Protocol. Netfilter/iptables, the firewall engine that is part of ...

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.

Greetings all,<BR> I was wondering if anyone could help me find a basic packet filtering firewall script that didn't involve nat'ting? I'm still very confused by the iptables setup and have tried ...

Network address translation and port address translation (NAT/PAT) originally were solutions for the depletion of the IPv4 addresses, and now are used by growing corporations to securely expand their ...

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 ...