The NSCA-ng package provides a client-server pair which makes the Nagios command pipe accessible to remote systems, with per-client passwords and fine-grained authorization control. This allows for submission of passive check results, downtimes, and many other commands to Nagios (or compatible monitoring solutions). Check results of arbitrary size and multiline plugin output are supported.
Derrick is a simple tool for recording data streams of TCP and UDP traffic. It shares similarities with other network recorders, such as tcpflow and wireshark, though it is more advanced than the first and clearly inferior to the latter. It has been specifically designed to monitor application-layer communication. In contrast to other tools, the application data is logged in a line-based ASCII format. Common Unix tools, such as grep, sed, and awk, can be directly applied. Even replay of recorded communication is straightforward using netcat. Derrick supports on-the-fly compression and rotation of log files.
Libntoh aims to be a user-friendly library to provide an easy way to perform defragmentation and reassembly of network/transport protocols. It is intended to provide a flexible, thread-safe, and highly configurable environment for the user. It performs IP defragmentation and TCP reassembly.
Watch My Network is a script that detects network devices connected to your network, and saves details of these devices to a MySQL database. You can access this data with a Web browser. This user interface has tabs like "Browsing History", "New Device Control", "IP - MAC Changing", "Vlan Search", and "Operating Systems Search in My Network". This program can be run repeatedly via crontab.
TIPP is an IP planning application for network departments of organizations with medium- to large-sized networks. While providing all the necessary functions for keeping track of your IP and network allocations, it combines simplicity of design and use with a clean and thoroughly modern look and feel.
radns is a small, portable client-side implementation of the RDNSS option in IPv6 Router Advertisements (RFC 5006) that is used to get the address of a resolving DNS server. It listens for Router Advertisements with the Recursive DNS Server (RDNSS) option and stores the addresses in a file following the same syntax as resolv.conf. It optionally calls a script to handle, for instance, DHCP clients that compete for ownership of /etc/resolv.conf or to set the DNS server on systems that don't use resolv.conf at all. It can be easily integrated with the resolvconf(8) program.
Mr Bix is a TCP proxy of sorts in which an incoming connection becomes two outgoing connections, only one of which returns data to the original incoming connection as with a normal TCP proxy; data returned from the other is discarded. It is intended to be used to permit testing of new services or servers with live traffic.