Network Security Toolkit is one of many live CD Linux distributions focusing on network monitoring, analysis, and security. NST was designed to give network security administrators easy access to a comprehensive set of open source network applications, many of which are among the top 100 security tools recommended by insecure.org.

ethtool or mii-tool utility checks or sets the status of a network interface’s Media Independent Interface (MII) unit. Most fast ethernet adapters use an MII to autonegotiate link speed and duplex setting.

GnuTLS is a modern C library that implements the standard network security protocol Transport Layer Security (TLS), for use by network applications. GnuTLS is developed for GNU/Linux, but works on many Unix-like systems and comes with a binary installer for Windows. The GnuTLS library is distributed under the terms of the GNU LGPL 2.1+.

If you've been using operating systems that are not Windows (but come to think of it, I've had plenty of networking problems in Windows as well), you know that getting both wired and WiFi network adapters to work in Linux, the BSDs and even Mac OS X is a crapshoot at best and prelude to weeks of often-futile hackery at worst.

If you've done any Google-ing on Wi-Fi security, you probably have the basics beaten into you: Don't use WEP, use WPA or WPA2, disable SSID broadcasting, change default settings, and so on. Therefore we'll forgo the basics and skip to other ways you might be able to increase the security of your wireless network.

Zorp ensures reliable and controlled connectivity of network infrastructures with improved performance, security and stability

BalaBit IT Security, one of the global leaders in developing privileged activity monitoring, trusted logging and proxy-based gateway technologies announced the general availability of Zorp 3.4, the feature release of its enterprise proxy firewall.

Being connected to the Internet means exposure to what the outside world has to offer -- including the undesirable elements. Every time you connect to the Internet, you're exposed to threats that can compromise your network's security. Although network security solutions have evolved in recent years, so have network attack techniques.

A Taiwanese network-appliance system integrator announced a wireless network security appliance that runs Linux. Drawing only 2.4 Watts, AR Infotek's fanless Teak 3018 is equipped with four auto-sensing Ethernet interfaces, plus WiFi, and targets SMBs (small- and medium-sized businesses).

Network access control (NAC) aims to unify endpoint security, system authentication, and security enforcement in a more intelligent network access solution than simple firewalls.