nefu (network fidelity utility) is a Unix daemon that monitors services over the network. It uses a "no false alarms" fault verification algorithm, and understands network dependancies. Natively-monitored protocols include ICMP echo (ping), SSH, IPP, DNS, HTTP, POP, NTP, IMAP, SMTP, and LDAP, as well as having facilities to execute external programs. Status pages are available via finger or the Web.
softflowd is a software flow-based network monitor. It tracks network traffic flows, reports aggregate statistics, and optionally exports Cisco Netflow compatible datagrams (to unicast hosts or multicast groups). It can listen on a promiscuous network interface or read store pcap capture files, and includes a sophisticated control interface.
Open1x is an open source implementation of the IEEE 802.1x protocol. The project has two components: xsupplicant and authenticator. Xsupplicant is an implementation of the supplicant (i.e., client) side of the protocol and works under Linux and Mac OS X. Authenticator is an implementation of the authenticator and works only under Linux.
Transparent Mobile IP (TMip) aims to provide IP mobility across multiple networks, ensuring that all active TCP sessions will be maintained upon client migration. No client-side software or alteration to the IP stack is required. The network itself changes to provide connectivity to hosts, using IP tunneling techniques.
Netdisco is a Web-based network management tool. Users can locate the switch port of an end-user system by IP or MAC address. Data is stored using a SQL database. Cisco Discovery Protocol (CDP) optionally provides automatic discovery of the network topology. The network is inventoried by both device model and operating system (like IOS). It uses router ARP tables and L2 switch MAC forwarding tables to locate nodes on physical ports and track them by their IP addresses. For each node, a time stamped history of the ports it has visited and the IP addresses it has used is maintained. It gets all its data, including CDP topology information, with SNMP polls and DNS queries. Security features include a wire-side Wireless Access Point (AP) locator.