The FreeS/WAN project provides a free VPN solution for the Linux platform, allowing users to create an IPSEC/3DES virtual private 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 Linux Kernel Stream Control Transmission Protocol (lksctp) project is an implementation of the Stream Control Transmission Protocol (SCTP) in the Linux kernel.

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

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.

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

SNIPS/NOCOL systems and network monitoring software.

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