The kernel level firewalling system in Linux 2.4. This site contains the source and documentation for the kernel-space code and user-space utilities.

An open source host, service, and network monitoring program.

SMB Server for Linux that allows a Linux machine to connect and share files with a Windows machine and/or Windows-based network.

The Linux Virtual Server is a highly scalable and highly available server built on a cluster of real servers, with the load balancer running on the Linux operating system. The architecture of the cluster is transparent to end users.

The FreeS/WAN project provides a free VPN solution for the Linux platform, allowing users to create an IPSEC/3DES virtual private network.

Point-to-point tunnelling protocol server for Linux. Allows Linux machines to operate PPTP VPNs with Windows 2000 machines.

The Linux Kernel Stream Control Transmission Protocol (lksctp) project is an implementation of the Stream Control Transmission Protocol (SCTP) in the Linux kernel.

Software used to implement egress+ingress traffic control over multiple interfaces using the usual egress qdiscs.

SNIPS/NOCOL systems and network monitoring software.

A Linux-based floppy distribution with support for Prism 2 and 2.5 WLAN cards.