Linux FreeS/WAN provides IPSEC (IP Security, which is both encryption and authentication) kernel extensions and an IKE (Internet Key Exchange, keying and encrypted routing daemon) as well as various rc scripts and documentation. It is known to interoperate with other IPSEC and IKE system already deployed by other vendors such as OpenBSD, Cisco, or CheckPoint. It also features Opportunistic Encryption, subnet extrusion, and with the appropriate patches interops nicely with Microsoft Windows XP/2000 using X.509 certificates.
tcpflow is a program that captures data transmitted as part of TCP connections (flows), and stores the data in a way that is convenient for protocol analysis or debugging. tcpflow understands TCP sequence numbers and will correctly reconstruct data streams regardless of retransmissions or out-of-order delivery. Each stream is stored in a separate file for later analysis. tcpflow is designed to be portable, using the LBL packet capture library and GNU autoconf. It works under most UNIX platforms and for most common network interface types (ethernet, PPP, loopback, etc.).
kimon is a simple ISDN monitor that attaches itself into the KDE taskbar. It displays the status of all connected ISDN devices that are known to ISDN4Linux. kimon can be configured to open a window with detailed information if a new connection is initiated via the ISDN devices. This program was designed to integrate the features of imon and isdnmon in the K Desktop Environment without using a lot of resources.
GTransferManager (gtm) allows the user to retrieve multiple files from the Web. These files can be retrieved in multiple parts, and each part retrieved on a separate session when the user is connected to the Internet. This is most useful to users with dialup connections. The program performs these tasks using wget as its backend.
Xtradius is a radius server that permits you to handle user authentication and accounting request via external scripts. You can handle script requests for user accounting, user authentication, NAS start and NAS stop packets. You can also write additional information into the NAS detail logfile. Parameters to scripts are passed via command line options or environment variables, making it very simple to implement SQL-based user accounting, authentication and account expiration. It is also compatible with "standard" cistron radius server.
The goal of the Linux WLAN project is to develop a complete, standards based, wireless LAN system using the GNU/Linux operating system. What differentiates this project from the Linux wireless extensions and other Linux wireless projects is that it is basing everything on the IEEE 802.11 standard.
Mars is a simple, extensible, services-oriented network status monitor written in Java. It monitors a network by simulating client connections to Internet services and reporting when those services are not responding as expected. It is quick and easy to install and configure, which distinguishes it from more complex network monitoring tools. Mars monitors HTTP, HTTPS, SMTP, IMAP, POP3, FTP, SSH, and JDBC, and notifies via SMTP and XMPP "out of the box". Support for new protocols, notifications, and reporting mechanisms is easy to add via Java or XML.
Ypldapd is a Network Information Service (NIS) server which uses LDAP as its information source. Using ypldapd, existing NIS clients can transparently use LDAP to resolve user, group and host information. Enterprises can thus realize the benefits of LDAP, such as its distribution and scalability, without ugprading clients. Used in conjunction with LDAP server technologies such as Netscape's Directory Server, ypldapd can provide single sign on to both NT and UNIX clients.