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 ...

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 ...

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 ...

“[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 ...

Every self-respecting Linux guru should be familiar with firewalls and how to install and configure them. With this in mind, Linux gurus also should be curious about how firewalls function and how to ...

GL Communications Inc., a global provider of network testing solutions, announced comprehensive capabilities in its PacketScanPX™ Packet Capture and Analysis platform, enabling engineers to perform ...

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 ...